ETA: apparently everyone thinks this guy’s work is wrong.
I thought his paper was nice and on a good track, but take with appropriate salt.
I am tempted to jest that the Voynich manuscript turned out to have been so difficult to decode because it was written by women, but this isn’t quite true.
It was just written in an extinct language of which we have almost no other written examples,
With an alphabet full of unknown characters,
And full of abbreviations and calligraphic shorthands.
If you’re not familiar with the Voynich manuscript, it’s a 240 page book that appears to have been written in Italy in the late 1400s. It’s filled with pictures of things like plants, bathing women, and a rather nice fold-out diagram of a volcano. It came to the world’s attention after Wilfrid Voynich purchased it from an old books dealer in 1912.
Because the Voynich manuscript is so weird, (especially the alphabet,) people have struggled for years to decipher it. Is it in code? Is it some non-European language like Chinese? Is it an elaborate hoax?
Given its resistance to all previous attempts at translation, I had written it off as probably a hoax–not a modern one perpetuated by Voynich, but a very old one played on some Medieval personage to sell them a worthless book full of supposed secret, magical knowledge for a handsome sum of money.
But it appears that Voynich has, at long last, been decoded by Gerard Cheshire.
It turns out that this “unknown language” isn’t Finnish, Basque, Navajo or something similarly difficult, but a kind of medieval Italian (or perhaps more accurately, late Latin,) known as proto-Romance. We have plenty of written examples of ancient Italian (otherwise known as Latin) and plenty of modern Italian, but few from the in-between period. It’s a bit like finding something written in Chaucerian English when you’re only familiar with modern English and Beowulf.
With this insight, the authors were able to decipher the strange alphabet, which employs no capitals but several extra symbols for dip- and tripthongs. (Kind of like Sequoia’s syllabary.)
The result is orthographically lovely, but very complicated. You should read the full article for an explanation for what all of the letters mean.
The really interesting thing is that this alphabet is nearly unique. Did the local nuns invent it for the purpose of the book? Were they literate in the regular alphabet used on the mainland, but felt it would be better to develop their own? Or was this commonly used in the area, but the vagaries of time destroyed all other remnants of it?
They found one of the keys to deciphering the manuscript lies in the map of the volcanic islands:
Within the manuscript there is a foldout pictorial map that provides the necessary information to date and locate the origin of the manuscript. It tells the adventurous, and rather inspiring, story of a rescue mission, by ship, to save the victims of a volcanic eruption in the Tyrrhenian Sea that began on the evening of the 4 February 1444 … The manuscript originates from Castello Aragonese, an island castle and citadel off Ischia, and was compiled for Maria of Castile, Queen of Aragon, (1401–58) who led the rescue mission as regent during the absence of her husband, King Alfonso V of Aragon (1396–1458) who was otherwise occupied, having only recently conquered and then taken control of Naples in February 1443. …
The island of Ischia is historically famous for its hot volcanic spas, which exist to this day. The manuscript has many images of naked women bathing in them, both recreationally and therapeutically. There are also images of Queen Maria and her court conducting trade negotiations whilst bathing. Clearly the spa lifestyle was highly regarded as a form of physical cleansing and spiritual communion, as well as a general means of relaxation and leisure. In many respects it would have been preferable to living in nearby Naples, which was the most important and cosmopolitan of cities in the Mediterranean at the time, but was still potentially dangerous for the spouse of an invading king. For example, in 1448 the barons of Naples launched a failed rebellion against Alfonso to reclaim their city.
In other words, while the menfolk were away, the Queen Maria of Ischia, a lovely little volcanic island off the coast of Naples, (the Wikipedia page is nice and has a couple of pictures of the castle where Queen Maria lived) had to lead the court, negotiate trade deals, and even led a rescue mission to an exploding volcano. She then decided to commission a local nun to write her a book on various matters of importance to the nearly all-female court. The various isolations inherent in island life probably account for several of the manuscripts peculiarities, from language to text.
Proto-Romance is thought to be ancestral not only to modern Italian, but to the various other romance languages, as well. It was a kind of lingua franca in the Mediterranean before modern political borders forced Italian, Spanish, Portuguese, etc., to fully differentiate. From the paper:
So, we have proto-Romance words surviving in the Mediterranean from Portugal, in the west, to Turkey, in the east. Clearly, it was a cosmopolitan lingua franca until the late Medieval period, when the political map began to inhibit meme flow, so that cultural isolation caused the modern languages to begin evolving. As a result, proto-Romance survived by vestigial fragmentation of its lexicon into the languages we see today. As such, manuscript MS408 is immensely important, because it is the only documentation of a language that was once ubiquitous over the Mediterranean and subsequently became the foundation for southern European linguistics in the present day.
There is another manuscript to introduce here, because it has similarity in calligraphic style and similarly combined letterforms. It is a memoire written by Loise De Rosa (1385–1475), who lived and worked in the court of Naples. It is titled De Regno di Napoli (The Kingdom of Naples) …
We can see that the calligraphic forms are quite legible and familiar to the modern eye and also noticeably different from those shared by manuscript MS408 and De Rosa. …
De Rosa’s work thus provides documentation of a writing system and a language akin to those of manuscript MS408, demonstrating that both evolved from the same naïve linguistic rootstock: i.e. both had emerged from Vulgar Latin, but in different ways due to their geographical and cultural separation. …
In fact we know, from De Rosa’s manuscript, that he fled to the safety of Castello Aragonese in 1441–42, when Alfonso was busy conquering Naples: He writes: ‘The patron said to me: “Son of mine, go to Ischia, for the great of age the place is safe”. I went to the marina and took a boat that travelled to the Castello di Ischia’. As incredible as it may seem, the chances are that De Rosa actually met the author of manuscript MS408 during his stay at the citadel.
So de Rosa met Maria and probably the nun who wrote the Voynich herself. It’s a really incredible story, both in the manuscript’s creation and the efforts it took to decaode it, and I encourage you to read the full article.
This book looks at thirteen different legal systems, ranging from Imperial China to modern Amish: how they worked, what problems they faced, how they dealt with them. Some chapters deal with a single legal system, others with topics relevant to several, such as problems with law based on divine revelation or how systems work in which law enforcement is private and decentralized. The book’s underlying assumption is that all human societies face the same problems, deal with them in an interesting variety of different ways, are all the work of grown-ups, hence should all be taken seriously. It ends with a chapter on features of past legal systems that a modern system might want to borrow.
Read up, enjoy, and let’s discuss it in about a month.
Welcome back to our discussion of Chinua Achebe’s Things Fall Apart. Today I wanted to take a closer look at some of the aspects of traditional Igbo society mentioned in the book.
If you are a regular reader of this blog, you know by now that just as early modern humans (Homo sapiens) mated with Neanderthals and Denisovans somewhere over in Eurasia, some sapiens mated with archaic humans in Africa.
Unfortunately, the state of knowledge about African genomes and especially archaic African genomes is very primitive. Not only does ancient DNA not preserve terribly well in many parts of Africa, but the continent is also rather poor and so people there don’t send their spit to 23 and Me very often to get DNA tested. Thus, sadly, I do not have archaic DNA percents for the Igbo.
Keep in mind that so far, Eurasians measure about 1-4% Neanderthal and Melanesians about 6% Denisovan, so 10% Ghost in west Africans is a pretty big deal (if you’re into archaic DNA.) The authors of the study estimate that the admixture occurred about 50,000 years ago, which is coincidentally about the same time as the admixture in non-Africans–suggesting that whatever triggered the Out of Africa migration may have also simultaneously triggered an Into Africa migration.
If you’re not familiar with some of these groups (I only know a little about the Yoruba,) the Esan, Mende, Gambians, and Yoruba are all speakers of languages from the Niger-Congo family (of which the Bantu languages are a sub-set.) The Niger-Congo family is one of the world’s largest, with 1,540 languages and 700 million speakers. It spread within the past 3,000 years from a homeland somewhere in west Africa (possibly Nigeria) to dominate sub-Saharan Africa. As far as I can tell, the Igbo are quite similar genetically to the Yoruba, and the admixture event happened tens of thousands of years before these groups spread and split, so there’s a good chance that the Igbo have similarly high levels of ghost-pop admixture.
Interestingly, a population related to the Bushmen and Pygmies used to dominate central and southern Africa, before the Bantu expansion. While the Bantu expansion and the admixture event are separated by a good 40 or 50 thousand years, this still suggests the possibility of human hybrid vigor.
Here, we examine 15 African populations covering all major continental linguistic groups, ecosystems, and lifestyles within Africa through analysis of whole-genome sequence data of 21 individuals sequenced at deep coverage. We observe a remarkable correlation among genetic diversity and geographic distance, with the hunter-gatherer groups being more genetically differentiated and having larger effective population sizes throughout most modern-human history. Admixture signals are found between neighbor populations from both hunter-gatherer and agriculturalists groups, whereas North African individuals are closely related to Eurasian populations. Regarding archaic gene flow, we test six complex demographic models that consider recent admixture as well as archaic introgression. We identify the fingerprint of an archaic introgression event in the sub-Saharan populations included in the models (~ 4.0% in Khoisan, ~ 4.3% in Mbuti Pygmies, and ~ 5.8% in Mandenka) from an early divergent and currently extinct ghost modern human lineage.
So the ghost population that shows up in the Pygmies the same ghost population as shows up in the Mende? Looks like it.
There’s a lot of interesting stuff in this paper, but I’d just like to highlight this one graph:
I don’t really understand how they compute these things, much less if this is accurate (though their present estimate for the size of the Han looks pretty good,) but assuming it is, we can say a few things: One, before 100,000 years ago, all of the groups–except the Laal of Chad–tracked closely together in size because they were one group. Most of the groups then got smaller simply because they split up. But there seems to have been some kind of really big population bottleneck a bit over a million years ago.
The other really interesting thing is the absolute Pygmy dominance of the mid-10,000-100,000 year range. The authors note:
It is noteworthy that we observed by PSMC a sudden Ne increase in Baka Pygmy around 30 kya. A similar increase was observed in another study that analyzed several Baka and Biaka samples . In addition, this individual presents the highest average genome-wide heterozygosity compared to the rest of samples (Fig. 1b). Nevertheless, such abrupt Ne increase can be attributed to either a population expansion or episodes of separation and admixture . Further analyses at population level are needed to distinguish between these two scenarios.
The egwugwu ceremony takes place in order to dispute the guilty side of a crime taken place, similar to our court trials… Nine egwugwu represented a village of the clan, their leader known as Evil Forest; exit the huts with their masks on.
Short page; fast read.
The egwugwu ceremony I found particularly interesting. Of course everyone knows the guys in masks are just guys in masks (well, I assume everyone knows that. It seems obvious,) yet in taking on the masks, they adopt a kind of veil of anonymity. In real life, they are people, with all of the biases of ordinary people; under the mask, they take on the identity of a spirit, free from the biases of ordinary people. It is similar to the official garb worn by judges in other countries, which often look quite silly (wigs on English barristers, for example,) but effectively demarcate a line between normal life and official pronouncements. By putting on the costume of the office, the judge becomes more than an individual.
I have long been fascinated by masks, masquerades, and the power of anonymity. Many famous writers, from Benjamin Franklin to Samuel Clemens, published under pseudonyms. The mask implies falseness–on Halloween, we dress up as things that we are not–but it also allows honesty by freeing us from the threat of retribution.
It is interesting that a small, tightly-knit society where everyone knows everyone and social relations are of paramount importance, like the Igbo, developed a norm of anonymizing judges in order to remove judicial decisions from normal social relations and obligations (as much as possible, anyway). Since most Igbo villages did not have kings or other aristocrats to dictate laws, rule was conducted by notable community members who had effectively purchased or earned noble titles. These nobles got to wear the masks and costumes of the egwgwu.
Ok, so it’s getting late and I need to wrap this up. This moment comes in every post.
I know I haven’t said much about the book itself. The plot, narrative, pacing, structure, writing style, etc. To be honest, that’s because I didn’t enjoy it very much. It was interesting for its content, along with a sense of “I’ve been trying to tell people this and I could have saved myself a lot of time by just pointing them to the book. And if this is a book taught in schools (we didn’t read it in my highschool, but I have heard that many people did,) then why aren’t people more aware of the contents?
What was tribal life like before the Europeans got there? Well, women got beaten a lot. Children were murdered to avenge tribal conflicts. Infant mortality was high. In other words, many things were pretty unpleasant.
“Much of the conduct described by anthropologists as conflict management, social control, or even law in tribal and other traditional societies is regarded as crime in modern [nation state] societies.” This is especially clear in the case of violent modes of redress such as assassination, feuding, fighting, maiming, and beating, but it also applies to the confiscation and destruction of property and to other forms of deprivation and humiliation. Such actions typically express a grievance by one person or group against another.
See, for example, when the village burned down Okonkwo’s house for accidentally killing a villager, when they burned down the church for “killing” a deity, or when they took a little girl and killed a little boy in revenge for someone in another village killing one of their women. To the villagers, these were all legal punishments, and the logic of burning down a person’s house if they have killed someone is rather similar to the logic of charging someone a fine for committing manslaughter. Even though Okonkwo didn’t mean to kill anyone, he should have been more careful with his gun, which he knew was dangerous and could kill someone.
Unlike penalties imposed by the state, however, private executions of this kind often result in revenge or even a feud—Moreover, the person killed in retaliation may not be himself or herself a killer, for in these societies violent conflicts between nonkin are virtually always handled in a framework of collective responsibility–or more precisely, collective liability–whereby all members of a social category (such as a family or lineage) are held accountable for the conduct of their fellows.
And, of course, penalties so meted out can be incredibly violent, arbitrary, and selfish, but ignoring that, there’s clearly a conflict when traditional, tribal ways of dealing with problems clash with state-based ways of dealing with problems. Even if everyone eventually agrees that the state-based system is more effective (and I don’t expect everyone to agree) the transition is liable to be difficult for some people, especially if, as in the book, they are punished by the state for enforcing punishments prescribed by their own traditional laws. The state is effectively punishing them for punishing law-breakers, creating what must seem to them a state of anarcho-tyranny.
Co-wife conflict is ubiquitous in polygynous households… Because the Turkana often choose wives from different families in order to broaden their safety net, they typically do not practice sororal [sister-wives] polygyny… When co-wives are relatives, they can more easily share a household and cooperate… But while sororal polygyny is especially common in cultures in the Americas, general polygyny tends to be the usual pattern in Africa. An examination of ethnographic data from 69 nonsororal polygynous cultures fails to turn up a single society where co-wife relations could be described as harmonious. Detailed ethnographic studies highlight the stresses and fears present in polygynous families, including, for example, wives’ concern that other wives might try to poison their children so that their own children might inherit land or property.
There is a well-entrenched schism on the frequency (how often), intensity (deaths per 100,000/year), and evolutionary significance of warfare among hunter-gatherers compared with large-scale societies. To simplify, Rousseauians argue that warfare among prehistoric and contemporary hunter-gatherers was nearly absent and, if present, was a late cultural invention. In contrast, so-called Hobbesians argue that violence was relatively common but variable among hunter-gatherers. … Furthermore, Hobbesians with empirical data have already established that the frequency and intensity of hunter-gatherer warfare is greater compared with large-scale societies even though horticultural societies engage in warfare more intensively than hunter-gatherers. In the end I argue that although war is a primitive trait we may share with chimpanzees and/or our last common ancestor, the ability of hunter-gatherer bands to live peaceably with their neighbors, even though war may occur, is a derived trait that fundamentally distinguishes us socially and politically from chimpanzee societies. It is a point often lost in these debates.
Welcome back to our discussion of Chinua Achebe’s Things Fall Apart. Today I thought it would be interesting to look at the history of the Igbo (aka Ibo) people, past and present.
The modern Igbo are one of the world’s larger ethnic groups, numbering around 34 million people, most of whom live in south east/central Nigeria. About 2 million Igbo live abroad, most of them in Britain (which, Chinua recounts, colonized Nigeria.) The Igbo diaspora is well-known for its intelligence, with Igbo students outscoring even Chinese students in the UK:
Although the Chinese and Indians are still very conspicuously above even the best African nationalities, their superiority disappears when the Nigerian and other groups are broken down even further according to their different tribal ethnicities. Groups like the famous Igbo tribe, which has contributed much genetically to the African American blacks, are well known to be high academic achievers within Nigeria. In fact, their performance seems to be at least as high as the “model minority” Chinese and Indians in the UK, as seen when some recent African immigrants are divided into languages spoken at home (which also indicates that these are not multigenerational descendants but children of recent immigrants).
Africans speaking Luganda and Krio did better than the Chinese students in 2011. The igbo were even more impressive given their much bigger numbers (and their consistently high performance over the years, gaining a 100 percent pass rate in 2009!). The superior Igbo achievement on GCSEs is not new and has been noted in studies that came before the recent media discovery of African performance. A 2007 report on “case study” model schools in Lambeth also included a rare disclosure of specified Igbo performance (recorded as Ibo in the table below) and it confirms that Igbos have been performing exceptionally well for a long time (5 + A*-C GCSEs); in fact, it is difficult to find a time when they ever performed below British whites.
Of course, Igbo immigrants to the UK are probably smarter than folks who didn’t figure out how to immigrate to the UK, but Peter Frost argues that even the ones who stayed at home are also pretty smart, via a collection of quotes:
All over Nigeria, Ibos filled urban jobs at every level far out of proportion to their numbers, as laborers and domestic servants, as bureaucrats, corporate managers, and technicians. Two-thirds of the senior jobs in the Nigerian Railway Corporation were held by Ibos. Three-quarters of Nigeria’s diplomats came from the Eastern Region. So did almost half of the 4,500 students graduating from Nigerian universities in 1966. The Ibos became known as the “Jews of Africa,” despised—and envied—for their achievements and acquisitiveness. (Baker, 1980)
The Ibos are the wandering Jews of West Africa — gifted, aggressive, Westernized; at best envied and resented, but mostly despised by the mass of their neighbors in the Federation.(Kissinger, 1969)
So what makes the Igbo so smart? Frost attributes their high IQ to the selective effects of an economy based on trade in which the Igbo were middlemen to the other peoples (mostly Yoruba and Fulani) around them, along with an excellent metalworking tradition:
Archaeological sites in the Niger Delta show that advanced economic development began much earlier there than elsewhere in West Africa. This is seen in early use of metallurgy. At one metallurgical complex, dated to 765 BC, iron ore was smelted in furnaces measuring a meter wide. The molten slag was drained through conduits to pits, where it formed blocks weighing up to 43-47 kg. …
This production seems to have been in excess of local needs and therefore driven by trade with other peoples …
This metallurgy is unusual not only in its early date for West Africa but also in its subsequent development, which reached a high level of sophistication despite a lack of borrowing from metallurgical traditions in the Middle East and Europe.
Here is a fun little video on Igbo bronzes (I recommend watching on double speed and pausing occasionally to appreciate the work quality):
So between the bronze, the river, and long-distance trade, the Igbo became the local market dominant minorities–and like most MDMs, with the arrival of democracy came genocide.
From June through October 1966, pogroms in the North killed an estimated 80,000 to 100,000 Igbo, half of them children, and caused more than a million to two million to flee to the Eastern Region. 29 September 1966, was considered the worst day; because of massacres, it was called ‘Black Thursday’.
Ethnomusicologist Charles Keil, who was visiting Nigeria in 1966, recounted:
The pogroms I witnessed in Makurdi, Nigeria (late Sept. 1966) were foreshadowed by months of intensive anti-Ibo and anti-Eastern conversations among Tiv, Idoma, Hausa and other Northerners resident in Makurdi, and, fitting a pattern replicated in city after city, the massacres were led by the Nigerian army. Before, during and after the slaughter, Col. Gowon could be heard over the radio issuing ‘guarantees of safety’ to all Easterners, all citizens of Nigeria, but the intent of the soldiers, the only power that counts in Nigeria now or then, was painfully clear. After counting the disemboweled bodies along the Makurdi road I was escorted back to the city by soldiers who apologised for the stench and explained politely that they were doing me and the world a great favor by eliminating Igbos.
… until the Igbos decided they’d had enough and declared themselves an independent country, Biafra, triggering a civil war. The Nigerian and British governments blockaded Biafra, resulting in mass starvation that left nearly 2 million dead.
Why the British government thought it was important to use money to starve children, I don’t know.
(Hint: the answer is oil.)
During the war, Britain covertly supplied Nigeria with weapons and military intelligence and may have also helped it to hire mercenaries. After the decision was made to back Nigeria, the BBC oriented its reporting to favour this side. Supplies provided to the Federal Military Government included two vessels and 60 vehicles.
(Richard Nixon, always the voice of morality, was against the blockade.)
Chinua Achebe published Things Fall Apart in 1959, the year before independence–so he was awfully prescient.
Secretary General of the United Nations, U Thant, refused to support the airlift. The position of the Organization of African Unity was to not intervene in conflicts its members’ deemed internal and to support the nation-state boundaries instituted during the colonial era. The ruling Labour Party of the United Kingdom, which together with the USSR was supplying arms to the Nigerian military,dismissed reports of famine as “enemy propaganda”.Mark Curtis writes that the UK also reportedly provided military assistance on the ‘neutralisation of the rebel airstrips’, with the understanding that their destruction would put them out of use for daylight humanitarian relief flights.
Soon Joint Church Aid, a combination of Protestant, Catholic, Jewish, and other NG organizations, chartered airplanes and began running the Nigerian blockade (three relief workers were killed when their plane was shot down.) The Biafra Airlift is second in scope only to the Berlin Airlift in non-combat airlifts.
Since the end of the war, the state of the Igbo people has steadily improved (the presence of oil in the area is finally benefiting them.)
Modern Nigeria has about 200 million people with a fertility rate around 5.5 children per woman (I don’t have data specifically about the Igbo) and a per capita GDP around $2,000, which is high for the area.
It’s getting late, so I’d like to end with some modern Igbo music, a reminder that the people we read about in anthropology books (or literature) never stay in anthropology books:
Yes, caring about your own stuff or your own culture’s stuff over another people’s stuff shows in-group bias. That was inherent back there in the words “your own.” It’s yours. Of course you care about it.
Only deities achieve perfect love. Even Jesus does not call on people to love strangers; he commands his followers to love each other and love their neighbors.
What does tamed mean?” [asked the Little Prince] …
“It means to create ties,”… the fox said. “For me, you’re only a little boy, like a hundred thousand other little boys. And I have no need of you, and you have no need of me, either. For you I’m only a fox like a hundred thousand other foxes. But if you tame me we’ll need each other. You’ll be the only boy in the world for me. I’ll be the only fox in the world for you.” …
And [the Prince] felt very unhappy. His flower had told him she was the only one of her kind in the whole universe. And here were five thousand of them, all alike, in just one garden! ….
And then he said to himself, I thought I was rich because I had one flower, and all I own is an ordinary rose… and he lay down and wept. …
Then [the fox] added, “Go look at the roses again. You’ll understand that yours is the only rose in all the world.”
The Little Prince went to look at the roses again. “You’re not at all like my rose. You’re nothing at all, yet,” he told them. “No one has tamed you and you haven’t tamed anyone. You’re the way my fox was. … But I’ve made him my friend, and now he’s the only fox in all the world.” …
“Of course, an ordinary passerby would think my rose looked just like you. But my rose, all on her own, is more important than all of you together, since she’s the one I watered. … Since she’s my rose.”
— Antoine de Saint-Exupery, The Little Prince
The inverse of loving what is yours is that you do not love what is not yours.
Part of the bittersweetness of the Little Prince is how closely it parallels the author’s own life, for not only did Saint-Exupery crash land in the Sahara, and not only was the rose based on his own wife, but he also fell from the sky and died when his plane was shot down over the Mediterranean during WWII.
Chinua Achebe’s Things Fall Apart follows the life of Okonkwo, a (fictional) Nigerian Igbo man who lived in a small village in the 1890s. The story follows Okonkwo’s determination to rise from nothing, slough off the shame of his father’s laziness, cowardice, and debt, and make a name for himself. Through Okonkwo’s eyes, we see the culture of the Onitsha Igbo, a real people, prior to the arrival of the British.
Then Okonkwo murders his foster son because the village authorities decided he should be killed (to avenge the death of a woman from Okonkwo’s tribe) and, as the title says, things fall apart.
Turning and turning in the widening gyre
The falcon cannot hear the falconer;
Things fall apart; the centre cannot hold;
Mere anarchy is loosed upon the world,
The blood-dimmed tide is loosed, and everywhere
The ceremony of innocence is drowned;
The best lack all conviction, while the worst
Are full of passionate intensity.
— W. B. Yeats, The Second Coming
It’s an interesting work from a cultural, historical perspective.
We cannot justify Okonkwo’s culture, nor Okonkwo himself. I do not think Achebe means to. It was a culture that murdered innocent people, forced some to be permanent “outcasts,” and sanctioned the beating of women and children. Okonkwo beat his wives and children (and as mentioned, murdered his foster son to avoid looking “weak” or “cowardly” in front of the other villagers.)
And yet, we hear Achebe’s voice saying, it was theirs.
My mother is not perfect, yet she is mine. My people are not perfect, yet they are mine. My culture is not perfect, yet it is mine. Okonkwo was a beloved husband, friend, leader, and father. And people love what is theirs.
Of course, taking another perspective, we could also read the novel as “Sure, the British put a stop to many terrible things, but they were SMUG about it!”
I can’t put much stock in the position that otherwise moral people committed evil acts simply because of their culture, since culture itself comes from the people in it. “I was only following orders” stopped being an excuse during the Nuremberg Trials. We moderns are expected to question and resist our culture at every turn, and I am not inclined to extend to Oknkwo generosity that would not be extended to me.
Of course, the Igbo are not the only people to have done terrible things. We all have sinned. Yes, the French committed crimes in the course of colonialism. So did the British:
The British had difficulty conquering Igboland, which lacked central political organisation. In the name of liberating the Igbos from the Aro Confederacy, the British launched the Anglo-Aro War of 1901–1902. Despite conquering villages by burning houses and crops, continual political control over the Igbo remained elusive. The British forces began annual pacification missions to convince the locals of British supremacy. …
After establishing political control of the country, the British implemented a system of taxation in order to force the indigenous Africans to shift from subsistence farming to wage labour. Sometimes forced labour was used directly for public works projects. These policies met with ongoing resistance
Of course, the British also did their best to put an end to the international slave trade and stopped the Igbo practice of human sacrifice:
However, animals were used to remove evil from the land. At times during pestilence, palm fronds, an animal or a human being will be tied at the entrance of the town with hope that the disease will enter into these objects and spare the inhabitants. To be attacked by such animal is regarded as ill luck and these living sacrifices are not eaten by anyone. In the past, two living beings were buried along side chiefs as servants to serve him in the spirit world. Slaves were usually used for this.
You can appreciate the good in a culture–and people–without accepting their evil.
Have you finished the book, yet? What do you think of it?
If you haven’t started yet, don’t worry–we’ll continue this conversation in a week.
The main character of the first 4 chapters of Harry Potter isn’t Harry: it’s the Dursleys:
Mr and Mrs Dursley, of number four, Privet Drive, were proud to say that they were perfectly normal, thank you very much. They were the last people you’d expect to be involved in anything strange or mysterious, because they just didn’t hold with such nonsense.
The Dursleys are awful and abusive in an over-the-top, Roald Dahl way that somehow manages not to cause Harry any serious emotional problems, which even I, a hard-core hereditarian, would find improbable if Harry were a real boy. But Harry isn’t the point: watching the Dursleys get their comeuppance is the point.
JRR Tolkien and JK Rowling both focused on the same group of people–common English peasants–but Tolkien’s depiction of the Hobbits are much more sympathetic than Rowling’s Muggles, even if they don’t like adventures:
This hobbit was a very well-to-do hobbit, and his name was Baggins. The Bagginses had lived in the neighborhood of The Hill for time out of mind and people considered them very respectable, not only because most of them were rich, but also because they never had any adventures or did anything unexpected: you could tell what a Baggins would say on any question without the bother of asking him.
We could wax philosophical (or political) about why Tolkien sees common folk as essentially good, despite their provinciality, and why Rowling sees them as essentially bad, for precisely the same reasons, but in the end both writers are correct, for there is good and bad in all groups.
Why are the Dursleys effective villains? Why is their buffoonish abuse believable, and why do so many people identify with young Harry? Is he not the Dursley’s kin, if not their son, their nephew? Shouldn’t they look out for him?
One of the great ironies of life is that the people who are closest to us are also the most likely to abuse us. Despite fears of “stranger danger” (or perhaps because of it) children are most likely to be harmed by parents, step-parents, guardians, or other close relatives/friends of the family, not strangers lurking in alleys or internet chatrooms.
…there were an estimated 57 000 deaths attributed to homicide among children under 15 years of age in 2000. Global estimates of child homicide suggest that infants and very young children are at greatest risk, with rates for the 0–4-year-old age group more than double those of 5–14-year-olds…
The risk of fatal abuse for children varies according to the income level of a country and region of the world. For children under 5 years of age living in high-income countries, the rate of homicide is 2.2 per 100 000 for boys and 1.8 per 100 000 for girls. In low- to middle-income countries the rates are 2–3 times higher – 6.1 per 100 000 for boys and 5.1 per 100 000 for girls. The highest homicide rates for children under 5 years of age are found in the WHO African Region – 17.9 per 100 000 for boys and 12.7 per 100 000 for girls.
(Aside: in every single region, baby boys were more likely to be murdered than baby girls–how’s that “male privilege” for you?)
Estimates of physical abuse of children derived from population-based surveys vary considerably. A 1995 survey in the United States asked parents how they disciplined their children (12). An estimated rate of physical abuse of 49 per 1000 children was obtained from this survey when the following behaviours were included: hitting the child with an object, other than on the buttocks; kicking the child; beating the child; and threatening the child with a knife or gun. …
.In a cross-sectional survey of children in Egypt, 37% reported being beaten or tied up by their parents and 26% reported physical injuries such as fractures, loss of consciousness or permanent disability as a result of being beaten or tied up (17).
. In a recent study in the Republic of Korea, parents were questioned about their behaviour towards their children. Two-thirds of the parents reported whipping their children and 45% confirmed that they had hit, kicked or beaten them (26).
. A survey of households in Romania found that 4.6% of children reported suffering severe and frequent physical abuse, including being hit with an object, being burned or being deprived of food. Nearly half of Romanian parents admitted to beating their children ‘‘regularly’’ and 16% to beating their children with objects (34).
. In Ethiopia, 21% of urban schoolchildren and 64% of rural schoolchildren reported bruises or swellings on their bodies resulting from parental punishment (14).
Ugh. The Dursleys are looking almost decent right now.
In most ways, the Dursleys do not fit the pattern characteristic of most abuse cases–severe abuse and neglect are concentrated among drug-addicted single mothers with more children than they can feed and an unstable rotation of unrelated men in and out of the household. The Dursley’s case is far more mild, but we may still ask: why would anyone mistreat their kin? Wouldn’t natural selection–selfish genes and all that–select against such behavior?
There are a number of facile explanations for the Dursley’s behavior. The first, suggest obliquely by Rowling, is that Mrs. Dursley was jealous of her sister, Lily, Harry’s mother, for being more talented (and prettier) than she was. This is the old “they’re only bullying you because they’re jealous” canard, and it’s usually wrong. We may discard this explanation immediately, as it is simply too big a leap from “I was jealous of my sister” to “therefore I abused her orphaned child for 11 years.” Most of us endured some form of childhood hardship–including sibling rivalry–without turning into abusive assholes who lock little kids in cupboards.
The superior explanation is that there is something about Harry that they just can’t stand. He’s not like them. This is expressed in Harry’s appearance–the Dursleys are described as tall, fat, pink skinned, and blue eyed with straight, blond hair, while Harry is described as short, skinny, pale skinned, and green-eyed with wavy, dark hair.
More importantly, Harry can do magic. The Dursley’s can’t.
It’s never explained in the books why some people can do magic and not others, but the trait looks strongly like a genetic one–not much more complicated than blue eyes. Magic users normally give birth to magical children, and non-magic users (the term “muggle” is an ethnic slur and should be treated as such,) normally have non-magical children. Occasionally magical children are born to regular families, just as occasionally two brown-eyed parents have a blue-eyed child because both parents carried a recessive blue eyed gene that they both happened to pass on to their offspring, and occasionally magical parents have regular children, just as smart people sometimes have dumb offspring. On the whole, however, magical ability is stable enough across generations that there are whole magical families that have been around for hundreds of years and non-magical families that have done the same.
Any other factor–environmental, magical–could have been figured out by now and used to turn kids like Neville into competent wizards, so we conclude that such a factor does not exist.
Magic is a tricky thing to map, metaphorically, onto everyday existence, because nothing like it really exists in our world. We can vaguely imagine that Elsa hiding her ice powers is kind of like a gay person hiding the fact that they are gay, but being gay doesn’t let you build palaces or create sentient snowmen. Likewise, the Dursely’s anger at Harry being “one of them” and adamantly claiming that magic and wizardry don’t exist, despite the fact that they know very well that Mrs. Dursley’s sister could turn teacups into frogs, does resemble the habit of certain very conservative people to pretend that homosexuality doesn’t exist, or that if their children never hear that homosexuality exists, they’ll never become gay.
The other difficulty with this metaphor is that gay people, left to their own devices, don’t produce children.
But putting together these two factors, we arrive at the conclusion that wizards are a distinct, mostly endogamous ethnic group that the Dursleys react to as though they were flaming homosexuals.
How many generations of endogamy would it take to produce two genetically distinct populations from one? Not many–take, for example, the Irish Travellers:
Researchers led by the Royal College of Surgeons in Ireland (RCSI) and the University of Edinburgh analysed genetic information from 42 people who identified as Irish Travellers.
The team compared variations in their DNA code with that of 143 European Roma, 2,232 settled Irish, 2,039 British and 6,255 European or worldwide individuals. …
They found that Travellers are of Irish ancestral origin but have significant differences in their genetic make-up compared with the settled community.
These differences have arisen because of hundreds of years of isolation combined with a decreasing Traveller population, the researchers say. …
The team estimates the group began to separate from the settled population at least 360 years ago.
That’s a fair bit of separation for a mere 360 years or so–and certainly enough for your relatives to act rather funny about it if you decided to run off with Travellers and then your orphaned child turned up on their doorstep.
How old are the wizarding families? Ollivander’s Fine Wands has been in business since 382 BC, and Merlin, Agrippa, and Ptolemy are mentioned as ancient Wizards, so we can probably assume a good 2,000 years of split between the two groups, with perhaps a 10% in-migration of non-magical spouses.
Harry is, based on his parents, 50% magical and 50% non-magical, though of course both Lily and Petunia Dursley probably carry some Wizard DNA.
In The Blank Slate, Pinker has some interesting observations on the subject of sociobiology:
As the notoriety of Sociobiology grew in the ensuing years, Hamilton and Trivers, who had thought up many of the ideas, also became targets of picketers… Trivers had argued that sociobiology is, if anything a force for political progress. It is rooted in the insight that organisms did not evolve to benefit their family, group, or species, because the individuals making up those groups have genetic conflicts of interest with one another and would be selected to defend those interests. This immediately subverts the comfortable belief that those in power rule for the good of all, and it throws a spotlight on hidden actors in the social world, such as female sand the younger generation.
Further in the book, Pinker continues:
Tolstoy’s famous remark that happy families are all alike but every unhappy family is unhappy in its own way is not true at the level of ultimate (evolutionary) causation. Trivers showed how the seeds of unhappiness in every family have the same underlying source. Though relatives have common interests because of their common genes, the degree of overlap is not identical within all their permutations and combinations of family members. Parents are related to all of their offspring by an equal factor, 50 percent, but each child is related to himself or herself by a factor of 100 percent. …
Parental investment is a limited resource. A day has only twenty-four hours … At one end of the lifespan, children learnt hat a mother cannot pump out an unlimited stream of milk; at the other, they learn that parents do not leave behind infinite inheritances.
To the extent that emotions among people reflect their typical genetic relatedness, Trivers argued, the members of a family should disagree on how parental investment should be divvied up.
And to the extent that one of the children in a household is actually a mixed-ethnicity nephew and no close kin at all to the father, the genetic relationship is even more distant between Harry and the Dursleys than between most children and the people raising them.
Parents should want to split their investment equitably among the children… But each child should want the parent to dole out twice as much of the investment to himself or herself as to a sibling, because children share half their genes with each full sibling but share all their genes with themselves. Given a family with two children and one pie, each child should want to split it in a ratio of two thirds to one third, while parents should want it to be split fifty fifty.
A person normally shares about 50% of their genes with their child and 25% of their genes with a niece or nephew, but we also share a certain amount of genes just by being distantly related to each other in the same species, race, or ethnic group.
Harry is, then, somewhat less genetically similar than the average nephew, so we can expect Mrs. Dursley to split any pies a bit less than 2/3s for Dudley and 1/3 for Harry, with Mr. Dursley grumbling that Harry doesn’t deserve any pie at all because he’s not their kid. (In a more extreme environment, if the Dursleys didn’t have enough pie to go around, it would be in their interest to give all of the pie to Dudley, but the Dursleys have plenty of food and they can afford to grudgingly keep Harry alive.)
Most kinds of social behavior, including perhaps all of the most complex forms, are based in one way or another on kinship. As a rule, the closer the genetic relationship of the members of a group, the more stable and intricate the social bonds of its members. …
Parent-offspring conflict and its obverse, sibling-sibling conflict, can be seen throughout the animal kingdom. Littermates or nestmates fight among themselves sometimes lethally, and fight with their mothers over access to milk, food, and care…. The conflict also plays out in the physiology of prenatal human development. Fetuses tap their mothers’ bloodstreams to mine the most nutrients possible from their body, while the mother’s body resists to keep it in good shape for future children. …
Trivers touted the liberatory nature of sociobiology by invoking an “underlying symmetry in our social relationships” and “submerged actors in the social world.” He was referring to women, as we will see in the chapter on gender, and to children. The theory of parent-offspring conflict says that families do not contain all-powerful, all-knowing parents and their passive, grateful children. …
Sometimes families contain Dursleys and Potters.
Most profoundly, children do not allow their personalities to be shaped by their parents’ nagging, blandishments, or attempts to serve as role models.
Quite lucky for Harry!
The offspring cannot rely on its parents for disinterested guidance. One expects the offspring to be preprogrammed to resist some parental manipulation while being open to other forms. When the parent imposes an arbitrary system of reinforcement (punishment and reward) in order to manipulate the offspring to act against its own best interests, selection will favor offspring that resist such schedules of reinforcement.
(Are mixed-race kids more likely to be abused than single-race kids? Well, they’re more likely to be abused than White, Asian, or Hispanic kids, but less likely to be abused than Black or Native American children [Native American children have the highest rates of abuse]. It seems likely that the important factor here isn’t degree of relatedness, but how many of your parents hail from a group with high rates of child abuse. The Dursleys are not from a group with high child abuse rates.)
Let us return to E. O. Wilson’s Sociobiology:
Mammalogists have commonly dealt with conflict as if it were a nonadaptive consequence of the rupture of the parent-offspring bond. Or, in the case of macaques, it has been interpreted as a mechanism by which the female forces the offspring into independence, a step designed ultimately to benefit both generations. …
A wholly different approach to the subject has been taken by Trivers (1974). … Trivers interprets it as the outcome of natural selection operating in opposite directions on the two generations. How is it possible for a mother and her child to be in conflict and both remain adaptive? We must remember that the two share only one half their genes by common descent. There comes a time when it is more profitable for the mother to send the older juvenile on its way and to devote her efforts exclusively to the production of a new one. To the extent that the first offspring stands a chance to achieve an independent life, the mother is likely to increase (and at most, double,) her genetic representation in the next breeding generation by such an act. But the youngster cannot be expected to view the matter in this way at all. …
If the mothers inclusive fitness suffers first from the relationship, conflict will ensue.
At some point, of course, the child is grown and therefore no longer benefits from the mother’s care; at this point the child and mother are no longer in conflict, but the roles may reverse as the parents become the ones in need of care.
As for humans:
Consider the offspring that behaves altruistically toward a full sibling. If it were the only active agent, its behavior would be selected when the benefit to the sibling exceeds two times the cost to itself. From the mother’s point of view, however, inclusive fitness is gained however the benefit to the sibling simply exceeds the cost to the altruist. Consequently, there is likely to evolve a conflict between parents and offspring in the attitudes toward siblings: the parent will encourge more altruism than the youngster is prepared to give. The converse argument also holds: the parent will tolerate less selfishness and spite among siblings than they have a tendency to display…
Indeed, Dudley is, in his way, crueler (more likely to punch Harry) and more greedy than even his parents.
Altruistic acts toward a first cousin are ordinarily selected if the benefit to the cousin exceeds 8 times the cost to the altruist, since the coefficient of relationship of first cousins is 1/8. However, the parent is related to its nieces and nephews by r=1/4, and it should prefer to see altruistic acts by its children toward their cousins whenever the benefit-to-cost ratio exceeds 2. Parental conscientiousness will also extend to interactions with unrelated individuals. From a child’s point of view, an act of selfishness or spite can provide a gain so long as its own inclusive fitness is enhanced… In human terms, the asymmetries in relationship and the differences in responses they imply will lead in evolution to an array of conflicts between parents and their children. In general, offspring will try to push their own socialization in a more egoistic fashion, while the parents will repeatedly attempt to discipline the children back to a higher level of altruism. There is a limit to the amount of altruism [healthy, normal] parents want to see; the difference is in the levels that selection causes the two generations to view as optimum.
To return to Pinker:
As if the bed weren’t crowded enough, every child of a man and a woman is also the grandchild of two other men and two other women. Parents take an interest in their children’s reproduction because in the long run it is their reproduction, too. Worse, the preciousness of female reproductive capacity makes it a valuable resource for the men who control her in traditional patriarchal societies, namely her father and brothers. They can trade a daughter or sister for additional wives or resources for themselves and thus they have an interest in protecting their investment by keeping her from becoming pregnant by men other than the ones they want to sell her to. It is not just the husband or boyfriend who takes a proprietary interest in a woman’s sexual activity, then, but also her father and brothers. Westerners were horrified by the treatment of women under the regime of the Taliban in Afghanistan from 1995 to 2001…
[ah such an optimist time Pinker wrote in]
Like many children, Harry is rescued from a bad family situation by that most modern institution, the boarding school.
The weakening of parents’ hold over their older children is also not just a recent casualty of destructive forces. It is part of a long-running expansion of freedom in the West that has granted children their always-present desire for more autonomy than parents are willing to cede. In traditional societies, children were shackled to the family’s land, betrothed in arranged marriages, and under the thumb of the family patriarch. That began to change in Medieval Europe, and some historians argue it was the first steppingstone in the expansion of rights that we associate with the Enlightenment and that culminated in the abolition of feudalism and slavery. Today it is no doubt true that some children are led astray by a bad crowd or popular culture. But some children are rescued from abusive or manipulative families by peers, neighbors, and teachers. Many children have profited from laws, such as compulsory schooling and the ban on forced marriages, that may override the preferences of their parents.
The sad truth, for Harry–and many others–is that their interests and their relatives’ interests are not always the same. Sometimes humans are greedy, self-centered, or just plain evil. Small children are completely dependent on their parents and other adults, unable to fend for themselves–so the death of his parents followed by abuse and neglect by his aunt and uncle constitute true betrayal.
But there is hope, even for an abused kid like Harry, because we live in a society that is much larger than families or tribal groups. We live in a place where honor killings aren’t common and even kids who aren’t useful to their families can find a way to be useful in the greater society. We live in a civilization.
Chapter 7 of The 10,000 Year Explosion is about the evolution of high Ashkenazi IQ; chapter 8 is the Conclusion, which is just a quick summary of the whole book. (If you’re wondering if you would enjoy the book, try reading the conclusion and see if you want to know more.)
This has been an enjoyable book. As works on human evolution go, it’s light–not too long and no complicated math. Pinker’s The Blank Slate gets into much more philosophy and ethics. But it also covers a lot of interesting ground, especially if you’re new to the subject.
I have seen at least 2 people mention recently that they had plans to respond to/address Cochran and Harpending’s timeline of Jewish history/evolution in chapter 7. I don’t know enough to question the story, so I hope you’ll jump in with anything enlightening.
The basic thesis of Chapter 7 is that Ashkenazi massive over-representation in science, math, billionaires, and ideas generally is due to their massive brains, which is due in turn to selective pressure over the past thousand years or so in Germany and nearby countries to be good at jobs that require intellect. The authors quote the historian B. D. Weinryb:
More children survived to adulthood in affluent families than in less affluent ones. A number of genealogies of business leaders, prominent rabbis, community leaders, and the like–generally belonging to the more affluent classes–show that such people often had four, six, sometimes even eight or nice children who reached adulthood…
Weinryb cites a census of the town of Brody, 1764: homeowner household had 1.2 children per adult; tenant households had only 0.6.
As evidence for this recent evolution, the authors point to the many genetic diseases that disproportionately affect Ashkenazim:
Tay-Sachs disease, Gaucher’s disease, familial dysautonomia, and two different forms of hereditary breast cancer (BRCA1 and BRCA2), and these diseases are up to 100 times more common in Ashkenazi Jews than in other European populations. …
In principle, absent some special cause, genetic diseases like these should be rare. New mutations, some of which have bad effects, appear in every generation, but those that cause death or reduced fertility should be disappearing with every generation. … one in every twenty-five Ashkenazi Jews carries a copy of the Tay-Sachs mutation, which kills homozygotes in early childhood. This is an alarming rate.
What’s so special about these diseases, and why do the Ashkenazim have so darn many of them?
Some of them look like IQ boosters, considering their effects on the development of the central nervous system. The sphingolipid mutations, in particular, have effects that could plausibly boost intelligence. In each, there is a buildup of some particular sphingolipid, a class of modified fat molecules that play a role in signal transmission and are especially common in neural tissues. Researchers have determined that elevated levels of those sphingolipids cause the growth of more connections among neurons..
There is a similar effect in Tay-Sachs disease: increased levels of a characteristic storage compound… which causes a marked increase in the growth of dendrites, the fine branches that connect neurons. …
We looked at the occupations of patients in Israel with Gaucher’s disease… These patients are much more likely to be engineers or scientists than the average Israeli Ashkenazi Jew–about eleven times more likely, in fact.
Basically, the idea is that similar to sickle cell anemia, being heterozygous for one of these traits may make you smarter–and being homozygous might make your life considerably shorter. In an environment where being a heterozygous carrier is rewarded strongly enough, the diseases will propagate–even if they incur a significant cost.
Von Neumann was a child prodigy. When he was 6 years old, he could divide two 8-digit numbers in his head  and could converse in Ancient Greek. When the 6-year-old von Neumann caught his mother staring aimlessly, he asked her, “What are you calculating?”
Children did not begin formal schooling in Hungary until they were ten years of age; governesses taught von Neumann, his brothers and his cousins. Max believed that knowledge of languages in addition to Hungarian was essential, so the children were tutored in English, French, German and Italian. By the age of 8, von Neumann was familiar with differential and integral calculus, but he was particularly interested in history. He read his way through Wilhelm Oncken‘s 46-volume Allgemeine Geschichte in Einzeldarstellungen. A copy was contained in a private library Max purchased. One of the rooms in the apartment was converted into a library and reading room, with bookshelves from ceiling to floor.
Von Neumann entered the Lutheran Fasori Evangélikus Gimnázium in 1911. Wigner was a year ahead of von Neumann at the Lutheran School and soon became his friend. This was one of the best schools in Budapest and was part of a brilliant education system designed for the elite. Under the Hungarian system, children received all their education at the one gymnasium. Despite being run by the Lutheran Church, the school was predominately Jewish in its student body  The school system produced a generation noted for intellectual achievement, which included Theodore von Kármán (b. 1881), George de Hevesy (b. 1885), Leó Szilárd (b. 1898), Dennis Gabor (b. 1900), Eugene Wigner (b. 1902), Edward Teller (b. 1908), and Paul Erdős (b. 1913). Collectively, they were sometimes known as “The Martians“.
One final thing in The 10,000 Year Explosion jumped out at me:
There are also reports of individuals with higher-than-average intelligence who have nonclassic congenital adrenal hyperplasia (CAH)… CAH, which causes increased exposure of the developing fetus to androgens (male sex hormones), is relatively mild compared to diseases like Tay-Sachs. At least seven studies show high IQ in CAH patients, parents, and siblings, ranging from 107 to 113. The gene frequency of CAH among the Ashkenazim is almost 20 percent.
Holy HBD, Batman, that’ll give you a feminist movement.
Heather Booth, Amy Kesselman, Vivian Rothstein and Naomi Weisstein. The names of these bold and influential radical feminists may have faded in recent years, but they remain icons to students of the women’s liberation movement …
The Gang of Four, as they dubbed themselves, were among the founders of Chicago’s Women’s Liberation Union. …
Over weeks, months and years, no subject went unturned, from the political to the sexual to the personal. They were “ready to turn the world upside down,” recalled Weisstein, an influential psychologist, neuroscientist and academic who died in 2015.
But one subject never came up: the Jewish backgrounds of the majority of the group.
“We never talked about it,” Weisstein said.
Betty Friedan was Jewish; Gloria Steinem is half Jewish. There are a lot of Jewish feminists.
Of course, Jews are over-represented in pretty much every intellectual circle. Ayn Rand, Karl Marx, and Noam Chomsky are all Jewish. Einstein and Freud were Jewish. I haven’t seen anything suggesting that Jews are more over-represented in feminism than in any other intellectual circle they’re over-represented in. Perhaps they just like ideas. Someone should come up with some numbers.
Here’s a page on Congenital Adrenal Hyperplasia. The “classic” variety is often deadly, but the non-classic (the sort we are discussing here) doesn’t kill you.
I’ve long suspected that I know so many trans people because some intersex conditions result in smarter brains (in this case, women who are better than average at math.) It looks like I may be on the right track.
Well, that’s the end of the book. I hope you enjoyed it. What did you think? And what should we read next? (I’m thinking of doing Pinker’s Blank Slate.)
Welcome back to the Book Club. Today we’re discussing chapter 6 of Cochran and Harpending’s The 10,000 Year Explosion: Expansions.
The general assumption is that the winning advantage is cultural–that is to say, learned. Weapons, tactics, political organization, methods of agriculture: all is learned. The expansion of modern humans is the exception to the rule–most observers suspect that biological difference were the root cause of their advantage. …
the assumption that more recent expansions are all driven by cultural factors is based on the notion that modern humans everywhere have essentially the same abilities. that’s a logical consequence of human evolutionary stasis” If humans have not undergone a significant amount of biological change since the expansion out of Africa, then people everywhere would have essentially the same potentials, and no group would have a biological advantage over its neighbors. But as we never tire of pointing out, there has been significant biological change during that period.
I remember a paper I wrote years ago (long before this blog) on South Korea’s meteoric economic rise. In those days you had to actually go to the library to do research, not just futz around on Wikipedia. My memory says the stacks were dimly lit, though that is probably just some romanticizing.
I poured through volumes on 5 year economic plans, trying to figure out why South Korea’s were more successful than other nations’. Nothing stood out to me. Why this plan and not this plan? Did 5 or 10 years matter?
I don’t remember what I eventually concluded, but it was probably something along the lines of “South Korea made good plans that worked.”
People around these parts often criticize Jared Diamond for invoking environmental explanations while ignoring or directly counter-signaling their evolutionary implications, but Diamond was basically the first author I read who said anything that even remotely began to explain why some countries succeeded and others failed.
Environment matters. Resources matter. Some peoples have long histories of civilization, others don’t. Korea has a decently long history.
Diamond was one of many authors who broke me out of the habit of only looking at explicit things done by explicitly recognized governments, and at wider patterns of culture, history, and environment. It was while reading Peter Frost’s blog that I first encountered the phrase “gene-culture co-evolution,” which supplies the missing link.
South Korea does well because 1. It’s not communist and 2. South Koreans are some of the smartest people in the world.
I knew #1, but I could have saved myself a lot of time in the stacks if someone had just told me #2 instead of acting like SK’s economic success was a big mystery.
The fact that every country was relatively poor before industrialization, and South Korea was particularly poor after a couple decades of warfare back and forth across the peninsula, obscures the nation’s historically high development.
For example, the South Korean Examination system, Gwageo, was instituted in 788 (though it apparently didn’t become important until 958). Korea has had agriculture and literacy for a long time, with accompanying political and social organization. This probably has more to do with South Korea having a relatively easy time adopting the modern industrial economy than anything in particular in the governments’ plans.
In fact, in my mind the real question is not why various peoples didn’t domesticate animals that we know were domesticable, but rather how anyone ever managed to domesticate the aurochs. At least twice. Imagine a longhorn on roids: they were big and aggressive, favorites in the Roman arena. …
The idea is that at least some individual aurochs were not as hostile and fearful of humans as they ought to have been, because they were being manipulated by some parasite. … This would have made domestication a hell of a lot easier. …
The beef tape worm may not have made it through Beringia. More generally, there were probably no parasites in the Americas that had some large mammal as intermediate host and Amerindians as the traditional definite host.
They never mentioned parasites in gov class.
Back to the book–I thought this was pretty interesting:
One sign of this reduced disease pressure is the unusual distribution of HLA alleles among Amerindians. the HLA system … is a group of genes that encode proteins expressed on the outer surfaces of cells. the immune system uses them to distinguish the self from non-self… their most important role is in infections disease. …
HLA genes are among the most variable of all genes. … Because these genes are so variable, any two humans (other than identical twins) are almost certain to have a different set of them. … Natural selection therefore favors diversification of the HLA genes, and some alleles, though rare, have been persevered for a long time. In fact, some are 30 million years old, considerably older than Homo sapiens. …
But Amerindians didn’t have that diversity. Many tribes have a single HLA allele with a frequency of over 50 percent. … A careful analysis of global HLA diversity confirms continuing diversifying selection on HLA in most human populations but finds no evidence of any selection at all favoring diversity in HLA among Amerindians.
The results, of course, went very badly for the Indians–and allowed minuscule groups of Spaniards to conquer entire empires.
The threat of European (and Asian and African) diseases wiping out native peoples continues, especially for “uncontacted” tribes. As the authors note, the Surui of Brazil numbered 800 when contacted in 1980, but only 200 in 1986, after tuberculosis had killed most of them.
…in 1827, smallpox spared only 125 out of 1,600 Mandan Indians in what later became North Dakota.
The past is horrific.
I find the history ancient exploration rather fascinating. Here is the frieze in Persepolis with the okapi and three Pygmies, from about 500 BC.
The authors quote Joao de Barros, a 16th century Portuguese historian:
But it seems that for our sins, or for some inscrutable judgment of God, in all the entrances of this great Ethiopia we navigate along… He has placed a striking angel with a flaming sword of deadly fevers, who prevents us from penetrating into the interior to the springs of this garden, whence proceed these rivers of gold that flow to the sea in so many parts of our conquest.
Barros had a way with words.
It wasn’t until quinine became widely available that Europeans had any meaningful success at conquering Africa–and even still, despite massive technological advantages, Europeans haven’t held the continent, nor have they made any significant, long-term demographic impact.
The book then segues into a discussion of the Indo-European expansion, which the authors suggest might have been due to the evolution of a lactase persistence gene.
(Even though we usually refer to people as “lactose intolerance” and don’t regularly refer to people as “lactose tolerant,” it’s really tolerance that’s the oddity–most of the world’s population can’t digest lactose after childhood.
Lactase is the enzyme that breaks down lactose.)
Since the book was published, the Indo-European expansion has been traced genetically to the Yamnaya (not to be confused with the Yanomamo) people, located originally in the steppes north of the Caucasus mountains. (The Yamnaya and Kurgan cultures were, I believe, the same.)
An interesting linguistic note:
Uralic languages (the language family containing Finnish and Hungarian) appear to have had extensive contact with early Indo-European, and they may share a common ancestry.
I hope these linguistic mysteries continue to be decoded.
In a new study, we have added a piece to the puzzle: the Y chromosomes of the majority of European men can be traced back to just three individuals living between 3,500 and 7,300 years ago. How their lineages came to dominate Europe makes for interesting speculation. One possibility could be that their DNA rode across Europe on a wave of new culture brought by nomadic people from the Steppe known as the Yamnaya.
Welcome back to the book club. Today we’re discussing Chapter 5 of The 10,000 Year Explosion, Gene Flow. In this chapter, Greg and Henry discuss some of the many ways genes can (and sometimes can’t) get around.
You know, sometimes it is difficult to think of something really interesting to say in reaction to something I’ve read. Sometimes I just think it is very interesting, and hope others find it so, too. This is one of those chapters.
So today I decided to read the papers cited in the chapter, plus a few more related papers on the subject.
Single-nucleotide polymorphism (SNP) analysis indicated that three major haplogroups, denoted as C, Q, and R, accounted for nearly 96% of Native American Y chromosomes. Haplogroups C and Q were deemed to represent early Native American founding Y chromosome lineages; however, most haplogroup R lineages present in Native Americans most likely came from recent admixture with Europeans. Although different phylogeographic and STR diversity patterns for the two major founding haplogroups previously led to the inference that they were carried from Asia to the Americas separately, the hypothesis of a single migration of a polymorphic founding population better fits our expanded database. Phylogenetic analyses of STR variation within haplogroups C and Q traced both lineages to a probable ancestral homeland in the vicinity of the Altai Mountains in Southwest Siberia. Divergence dates between the Altai plus North Asians versus the Native American population system ranged from 10,100 to 17,200 years for all lineages, precluding a very early entry into the Americas.
We found that sociocultural factors have played a more important role than language or geography in shaping the patterns of Y chromosome variation in eastern North America. Comparisons with previous mtDNA studies of the same samples demonstrate that male and female demographic histories differ substantially in this region. Postmarital residence patterns have strongly influenced genetic structure, with patrilocal and matrilocal populations showing different patterns of male and female gene flow. European contact also had a significant but sex-specific impact due to a high level of male-mediated European admixture. Finally, this study addresses long-standing questions about the history of Iroquoian populations by suggesting that the ancestral Iroquoian population lived in southeastern North America.
And in Mexico, your different racial mix has something to do with your risk of Type 2 Diabetes, but you know, race is a social construct or something:
Type 2 diabetes (T2D) is at least twice as prevalent in Native American populations as in populations of European ancestry, so admixture mapping is well suited to study the genetic basis of this complex disease. We have characterized the admixture proportions in a sample of 286 unrelated T2D patients and 275 controls from Mexico City and we discuss the implications of the results for admixture mapping studies. … The average proportions of Native American, European and, West African admixture were estimated as 65, 30, and 5%, respectively. The contributions of Native American ancestors to maternal and paternal lineages were estimated as 90 and 40%, respectively. In a logistic model with higher educational status as dependent variable, the odds ratio for higher educational status associated with an increase from 0 to 1 in European admixture proportions was 9.4 (95%, credible interval 3.8-22.6). This association of socioeconomic status with individual admixture proportion shows that genetic stratification in this population is paralleled, and possibly maintained, by socioeconomic stratification. The effective number of generations back to unadmixed ancestors was 6.7 (95% CI 5.7-8.0)…
In other words, Conquistador men had children with a lot of the local ladies.
Studies of Native South American genetic diversity have helped to shed light on the peopling and differentiation of the continent, but available data are sparse for the major ecogeographic domains. These include the Pacific Coast, a potential early migration route; the Andes, home to the most expansive complex societies and to one of the most spoken indigenous language families of the continent (Quechua); and Amazonia, with its understudied population structure and rich cultural diversity. Here we explore the genetic structure of 177 individuals from these three domains, genotyped with the Affymetrix Human Origins array. We infer multiple sources of ancestry within the Native American ancestry component; one with clear predominance on the Coast and in the Andes, and at least two distinct substrates in neighboring Amazonia, with a previously undetected ancestry characteristic of northern Ecuador and Colombia. Amazonian populations are also involved in recent gene-flow with each other and across ecogeographic domains, which does not accord with the traditional view of small, isolated groups. Long distance genetic connections between speakers of the same language family suggest that languages had spread not by cultural contact alone. Finally, Native American populations admixed with post-Columbian European and African sources at different times, with few cases of prolonged isolation.
The X chromosome in non-African populations has less diversity and less Neanderthal introgression than expected. We analyzed X chromosome diversity across the globe and discovered seventeen chromosomal regions, where haplotypes of several hundred kilobases have recently reached high frequencies in non-African populations only. The selective sweeps must have occurred more than 45,000 years ago because the ancient Ust’-Ishim male also carries its expected proportion of these haplotypes. Surprisingly, the swept haplotypes are entirely devoid of Neanderthal introgression, which implies that a population without Neanderthal admixture contributed the swept haplotypes. It also implies that the sweeps must have happened after the main interbreeding event with Neanderthals about 55,000 BP. These swept haplotypes may thus be the only genetic remnants of an earlier out-of-Africa event.
Why not a later out-of-Africa event? Or a simultaneous event that just happened not to mate with Neanderthals? Or sweeps on the X chromosome that happened to remove Neanderthal DNA due to Neanderthal and X being really incompatible? I don’t know.
Who are Europeans? Both prehistoric archaeology and, subsequently, classical population genetics have attempted to trace the ancestry of modern Europeans back to the first appearance of agriculture in the continent; however, the question has remained controversial. Classical population geneticists attributed the major pattern in the European gene pool to the demographic impact of Neolithic farmers dispersing from the Near East, but archaeological research has failed to uncover substantial evidence for the population growth that is supposed to have driven this process. … Both mitochondrial DNA and Y-chromosome analyses have indicated a contribution of Neolithic Near Eastern lineages to the gene pool of modern Europeans of around a quarter or less. This suggests that dispersals bringing the Neolithic to Europe may have been demographically minor and that contact and assimilation had an important role.
I wouldn’t call a quarter “minor.” But it is true that the Anatolian farming people who invaded Europe didn’t kill off all of the locals, and then later Europe was invaded by the non-Anatolian, Indo-European people.
(i) All Australian lineages are confirmed to fall within the mitochondrial founder branches M and N and the Y chromosomal founders C and F, which are associated with the exodus of modern humans from Africa ≈50–70,000 years ago. The analysis reveals no evidence for any archaic maternal or paternal lineages in Australians, despite some suggestively robust features in the Australian fossil record, thus weakening the argument for continuity with any earlier Homo erectus populations in Southeast Asia. (ii) The tree of complete mtDNA sequences shows that Aboriginal Australians are most closely related to the autochthonous populations of New Guinea/Melanesia, indicating that prehistoric Australia and New Guinea were occupied initially by one and the same Palaeolithic colonization event ≈50,000 years ago, … (iii) The deep mtDNA and Y chromosomal branching patterns between Australia and most other populations around the Indian Ocean point to a considerable isolation after the initial arrival. (iv) We detect only minor secondary gene flow into Australia, and this could have taken place before the land bridge between Australia and New Guinea was submerged ≈8,000 years ago…
Aboriginal Australians represent one of the oldest continuous cultures outside Africa, with evidence indicating that their ancestors arrived in the ancient landmass of Sahul (present-day New Guinea and Australia) ~55 thousand years ago. … We have further resolved known Aboriginal Australian mitochondrial haplogroups and discovered novel indigenous lineages by sequencing the mitogenomes of 127 contemporary Aboriginal Australians. In particular, the more common haplogroups observed in our dataset included M42a, M42c, S, P5 and P12, followed by rarer haplogroups M15, M16, N13, O, P3, P6 and P8. We propose some major phylogenetic rearrangements, such as in haplogroup P where we delinked P4a and P4b and redefined them as P4 (New Guinean) and P11 (Australian), respectively. Haplogroup P2b was identified as a novel clade potentially restricted to Torres Strait Islanders. Nearly all Aboriginal Australian mitochondrial haplogroups detected appear to be ancient, with no evidence of later introgression during the Holocene.
We find that recent population history within Indonesia is complex, and that populations from the Philippines made important genetic contributions in the early phases of the Austronesian expansion. Different, but interrelated processes, acted in the east and west. The Austronesian migration took several centuries to spread across the eastern part of the archipelago, where genetic admixture postdates the archeological signal. As with the Neolithic expansion further east in Oceania and in Europe, genetic mixing with local inhabitants in eastern Indonesia lagged behind the arrival of farming populations. In contrast, western Indonesia has a more complicated admixture history shaped by interactions with mainland Asian and Austronesian newcomers, which for some populations occurred more than once. Another layer of complexity in the west was introduced by genetic contact with South Asia and strong demographic events in isolated local groups.
I liked the quote from Jared Diamond (say what you will about him, I like Diamond. He at least tries hard to tackle difficult questions):
“When I was living among Elopi tribespeople in west New Guinea and wanted to cross the territory of the neighboring Fayu tribe in order to reach a nearby mountain, the Elopis explained tome matter-of-factly that the Fayus would kill me if I tried. From a New Guinea perspective, it seemed so perfectly natural and self-explanatory. Of course the Fayus will kill any trespasser…”
This is why people often claim that we moderns are the WEIRDOs.
Three Pakistani populations residing in northern Pakistan, the Burusho, Kalash and Pathan claim descent from Greek soldiers associated with Alexander’s invasion of southwest Asia. … In pairwise comparisons between the Greeks and the three Pakistani populations using genetic distance measures sensitive to recent events, the lowest distances were observed between the Greeks and the Pathans. Clade E3b1 lineages, which were frequent in the Greeks but not in Pakistan, were nevertheless observed in two Pathan individuals, one of whom shared a 16 Y-STR haplotype with the Greeks. The worldwide distribution of a shortened (9 Y-STR) version of this haplotype, determined from database information, was concentrated in Macedonia and Greece, suggesting an origin there. Although based on only a few unrelated descendants this provides strong evidence for a European origin for a small proportion of the Pathan Y chromosomes.
Of course, who can discuss genetic spread without mentioning that lord of men, Genghis Khan?
We have identified a Y-chromosomal lineage with several unusual features. It was found in 16 populations throughout a large region of Asia, stretching from the Pacific to the Caspian Sea, and was present at high frequency: ∼8% of the men in this region carry it, and it thus makes up ∼0.5% of the world total. The pattern of variation within the lineage suggested that it originated in Mongolia ∼1,000 years ago. Such a rapid spread cannot have occurred by chance; it must have been a result of selection. The lineage is carried by likely male-line descendants of Genghis Khan, and we therefore propose that it has spread by a novel form of social selection resulting from their behavior.
Several studies have shown that the OCA2 locus is the major contributor to the human eye color variation. By linkage analysis of a large Danish family, we finemapped the blue eye color locus to a 166 Kbp region within the HERC2 gene. … The brown eye color allele of rs12913832 is highly conserved throughout a number of species. … One single haplotype, represented by six polymorphic SNPs covering half of the 3′ end of the HERC2 gene, was found in 155 blue-eyed individuals from Denmark, and in 5 and 2 blue-eyed individuals from Turkey and Jordan, respectively. Hence, our data suggest a common founder mutation in an OCA2 inhibiting regulatory element as the cause of blue eye color in humans. In addition, an LOD score of Z = 4.21 between hair color and D14S72 was obtained in the large family, indicating that RABGGTA is a candidate gene for hair color.
What about you? What did you think of this chapter?
When they compared the DNA of the strain recovered from this cemetery to all published Y. pestis genomes, they found that it was the oldest (most basal) strain of the bacterium ever recovered. Using the molecular clock, they were able to estimate a timeline for the divergence and radiation of Y. pestis strains and tie these events together to make a new, testable model for the emergence and spread of this deadly human pathogen.
These analyses indicate that plague was not first spread across Europe by the massive migrations by the Yamnaya peoples from the central Eurasian steppe (around 4800 years ago)… Rascovan et al. calculated the date of the divergence of Y. pestis strains at between 6,000 and 5,000 years ago. This date implicates the mega-settlements of the Trypillia Culture as a possible origin point of Y. pestis. These mega-settlements, home to an estimated 10,000-20,000 people, were dense concentrations of people during that time period in Europe, with conditions ideal for the development of a pandemic.
The Cucuteni-Trypilia Culture flourished between the Carpathian Mountains and the Black Sea from 4800-3000 BC. It was a neolithic–that is, stone age–farming society with many large cities. Wikipedia gives a confused account of its demise:
According to some proponents of the Kurgan hypothesis of the origin of Proto-Indo-Europeans … the Cucuteni–Trypillia culture was destroyed by force. Arguing from archaeological and linguistic evidence, Gimbutas concluded that the people of the Kurgan culture (a term grouping the Yamnaya culture and its predecessors) … effectively destroyed the Cucuteni–Trypillia culture in a series of invasions undertaken during their expansion to the west. Based on this archaeological evidence Gimbutas saw distinct cultural differences between the patriarchal, warlike Kurgan culture and the more peaceful egalitarian Cucuteni–Trypillia culture, … which finally met extinction in a process visible in the progressing appearance of fortified settlements, hillforts and the graves of warrior-chieftains, as well as in the religious transformation from the matriarchy to patriarchy, in a correlated east–west movement. In this, “the process of Indo-Europeanization was a cultural, not a physical, transformation and must be understood as a military victory in terms of successfully imposing a new administrative system, language, and religion upon the indigenous groups.
How does it follow that the process was a cultural, not physical transformation? They got conquered.
In his 1989 book In Search of the Indo-Europeans, Irish-American archaeologist J. P. Mallory, summarising the three existing theories concerning the end of the Cucuteni–Trypillia culture, mentions that archaeological findings in the region indicate Kurgan (i.e. Yamnaya culture) settlements in the eastern part of the Cucuteni–Trypillia area, co-existing for some time with those of the Cucuteni–Trypillia.Artifacts from both cultures found within each of their respective archaeological settlement sites attest to an open trade in goods for a period, though he points out that the archaeological evidence clearly points to what he termed “a dark age,” its population seeking refuge in every direction except east. He cites evidence of the refugees having used caves, islands and hilltops (abandoning in the process 600–700 settlements) to argue for the possibility of a gradual transformation rather than an armed onslaught bringing about cultural extinction.
How is “refugees hiding in caves” a “gradual transformation?” That sounds more like “people fleeing an invading army.”
The obvious issue with that theory is the limited common historical life-time between the Cucuteni–Trypillia (4800–3000 BC) and the Yamnaya culture (3300–2600 BC); given that the earliest archaeological findings of the Yamnaya culture are located in the Volga–Donbasin, not in the Dniester and Dnieper area where the cultures came in touch, while the Yamnaya culture came to its full extension in the Pontic steppe at the earliest around 3000 BC, the time the Cucuteni–Trypillia culture ended, thus indicating an extremely short survival after coming in contact with the Yamnaya culture.
How is that an issue? How long does Wikipedia think it takes to slaughter a city? It takes a few days. 300 years of contact is plenty for both trade and conquering.
Another contradicting indication is that the kurgans that replaced the traditional horizontal graves in the area now contain human remains of a fairly diversified skeletal type approximately ten centimetres taller on average than the previous population.
What are we even contradicting? Sounds like they got conquered, slaughtered, and replaced.
Then Wikipedia suggests that maybe it was all just caused by the weather (which isn’t a terrible idea.) Drought weakened the agriculturalists and prompted the pastoralists to look for new grasslands for their herds. They invaded the agriculturalists’ areas because they were lush and good for growing grain, which the pastoralists’ cattle love eating. The already weakened agriculturalists couldn’t fight back.
ANYWAY. Lets get on with Greg and Henry’s account, The 10,000 Year Explosion:
The population expansion associated with farming increased crowding, while farming itself made people sedentary. Mountains of garbage and water supplies contaminated with human waste favored the spread of infectious disease. …
Most infectious diseases have a critical community size, a number and concentration of people below which they cannot persist. The classic example is measles, which typically infects children and remains infectious for about ten days, after which the patient has lifelong immunity. In order for measles to survive, the virus that causes it, the paramyxovirus, must continually find unexposed victims–more children. Measles can only persist in a large, dense population: Populations that are too small or too spread out (under half a million in close proximity) fail to produce unexposed children fast enough, so the virus dies out.
Measles, bubonic plague, smallpox: all results of agriculture.
Chickenpox: not so much.
I wonder if people in the old Cucuteni–Trypillia area are particularly immune to bubonic plague, or if the successive waves of invading steppe nomads have done too much genetic replacement (slaughtering) for adaptations to stick around?
Harpending and Cochran then discuss malaria, which has had a big impact on human genomes (eg, sickle cell,) in the areas where malaria is common.
In general, the authors play it safe in the book–pointing to obvious cases of wide-scale genetic changes like sickle cell that are both undoubtable and have no obvious effect on personality or intelligence. It’s only in the chapter on Ashkenazi IQ that they touch on more controversial subjects, and then in a positive manner–it’s pleasant to think, “Why was Einstein so smart?” and less pleasant to think, “Why am I so dumb?”
It’s time to address the old chestnut that biological differences among human populations are “superficial,” only skin-deep. It’s not true: We’re seeing genetically caused differences in all kinds of functions, and every such differences was important enough to cause a significant increase in fitness (number of offspring)–otherwise it wouldn’t have reached high frequency in just a few millennia.
As for skin color, Cochran and Harpending lean on the side of high-latitude lightening having been caused by agriculture, rather than mere sunlight levels:
Interestingly, the sets of changes driving light skin color in China are almost entirely different from those performing a similar function in Europe. …
Many of these changes seem to be quite recent. The mutation that appears to have the greatest effect on skin color among Europeans and neighboring peoples, a variant of SLC24A5, has spread with astonishing speed. Linkage disequilibrium… suggests that it came into existence about 5,800 years ago, but it has a frequency of 99 percent throughout Europe and is found at significant levels in North Africa, East Africa, and as far east as India and Ceylon. If it is indeed that recent, it must have had a huge selective advantage, perhaps as high as 20 percent. It would have spread so rapidly that, over a long lifetime a farmer could have noticed the change in appearance in his village.
In humans, OAC2 … is a gene involved in the melanin pathway… Species of fish trapped in caves… lose their eyesight and become albinos over many generations. … Since we see changes in OCA2 in each [fish] case, however, there must have been some advantage in knocking out OCA2, at least in that underground environment. The advantage cannot like in increased UV absorption, since there’s no sunlight in those caves.
There are hints that knocking out OCA2, or at least reducing its activity, may he advantageous… in humans who can get away with it. We see a pattern that suggests that having one inactive copy of OCA2 is somehow favored even in some quite sunny regions. In southern Africa, a knocked-out version of OCA2 is fairly common: The gene frequency is over 1 percent.
And that’s an area with strong selection for dark skin.
A form of OCA2 albinism is common among the Navajo and other neighboring tribes, with gene frequencies as high as 4.5 percent. The same pattern appears in southern Mexico, eastern Panama, and southern Brazil. All of which suggests that heterozygotes…may ave some advantage.
So why do Europeans have such variety in eye and hair color?
The skeletal record clearly supports the idea that there has been rapid evolutionary change in humans over the past 10,000 years. The human skeleton has become more gracile–more lightly built–though more so in some populations than others. Our jaws have shrunk, our long bones have become lighter, and brow ridges have disappeared in most populations (with the notable exception of Australian Aborigines, who have also changed, but not as much; they still have brow ridges, and their skulls are about twice as thick as those of other peoples.)
This could be related to the high rates of interpersonal violence common in Australia until recently (thicker skulls are harder to break) or a result of interbreeding with Neanderthals and Denisovans. We don’t know what Denisovans looked like, but Neanderthals certainly are noted for their robust skulls.
Skull volume has decreased, apparently in all populations: In Europeans, volume is down about 10 percent from the high point about 20,000 years ago.
This seems like a bad thing. Except for mothers.
Some changes can be seen even over the past 1,000 years. English researchers recently compared skulls from people who died in the Black Death ([approximately] 650 years ago), from the crew of the Mary Rose,a ship that sank in Tudor times ([approximately] 450 years ago) and from our contemporaries. The shape of the skull changed noticeably over that brief period–which is particularly interesting because we know there has been no massive population replacement in England over the past 700 years.
Hasn’t there been a general replacement of the lower classes by the upper classes? I think there was also a massive out-migration of English to other continents in the past five hundred years.
The height of the cranial vault of our contemporaries was about 15 percent larger than that of the earlier populations, and the part of the skull containing the frontal lobes was thus larger.
This is awkwardly phrased–I think the authors want the present tense–“the cranial vault of our contemporaries is…” Nevertheless, it’s an interesting study. (The frontal lobes control things like planning, language, and math.)
We then proceed to the rather depressing Malthus section and the similar “elites massively out-breeding commoners due to war or taxation” section. You’re probably familiar with Genghis Khan by now.
We’ve said that the top dogs usually had higher-than-average fertility, which is true, but there have been important exceptions… The most common mistake must have been living in cities, which have almost always been population sinks, mostly because of infectious disease.
They’re still population sinks. Just look at Singapore. Or Tokyo. Or London.
The case of silphium, a natural contraceptive and abortifacient eaten to extinction during the Classical era, bears an interesting parallel to our own society’s falling fertility rates.
And of course, states domesticate their people:
Farmers don’t benefit from competition between their domesticated animals or plants… Since the elites were in a very real sense raising peasants, just as peasants raised cows, there must have been a tendency for them to cull individuals who were more aggressive than average, which over time would have changed the frequencies of those alleles that induced such aggressiveness.
On the one hand, this is a very logical argument. On the other hand, it seems like people can turn on or off aggression to a certain degree–uber peaceful Japan was rampaging through China only 75 years ago, after all.
Have humans been domesticated?
(Note: the Indians captured by the Puritans during the Pequot War may have refused to endure the yoke, but they did practice agriculture–they raised corn, squash and beans, in typical style. Still, they probably had not endured under organized states for as long as the Puritans.)
There is then a fascinating discussion of the origins of the scientific revolution–an event I am rather fond of.
Although we do not as yet fully understand the true causes of the scientific and industrial revolution, we must now consider the possibility that continuing human evolution contributed to that process. It could explain some of the odd historical patterns that we see.
Well, that’s enough for today. Let’s continue with Chapter 5 next week.
How about you? What are your thoughts on the book?