There are three versions of this graph in the paper (check the supplemental materials for two of them), all showing about the same thing. It is supposed to be a graph of population size at different times in the past, and the most incredible thing is that for the past 100,000 years or so, the most numerically dominant populations in Africa were the Baka Pygmies, followed by various Bushmen (San) groups. The authors write:
To unravel the ancient demographic history of the African populations that are present in our data set, we used the Pairwise Sequentially Markovian Coalescent (PSMC) model that analyzes the dynamics of the effective population size over time . We included at least one representative of each of the 15 African populations and two Eurasian samples in the analysis (Additional file 1: Figure S7.1) and considered both the classical mutation rate of 2.5 × 10−8  and the 1.2 × 10−8 mutations per bp per generation reported in other analyses [62, 63]. The demographic trajectories of the sub-Saharan agriculturalist populations are very similar to each other; and only South African Bantu and Toubou individuals differ partly from the rest of sub-Saharan farmer samples; however, their considerable levels of admixture with other North African or hunter-gatherer populations (Fig. 2b) might explain this trend. Therefore, in order to ease visualization, we plotted a Yoruba individual (Yoruba_HGDP00936) and two Ju|‘hoansi individuals as representatives of the sub-Saharan agriculturalist and Khoisan populations, respectively (Fig. 3 and Additional file 1: Figure S7.2 considering a mutation rate of 1.2 × 10−8).
The authors note that the apparent large size of the pygmy groups could have been due to groups splitting and merging and thus getting more DNA variety than they would normally. It’s all very speculative. But still, the Baka Pygmies could have been the absolutely dominant group over central Africa for centuries.
Welcome to EvX’s Book Club. Today we begin our exciting tour of Philip E. Auerswald’s The Code Eoconomy: A Forty-Thousand-Year History. with the introduction, Technology = Recipes, and Chapter one, Jobs: Divide and Coordinate if we get that far.
I’m not sure exactly how to run a book club, so just grab some coffee and let’s dive right in.
First, let’s note that Auerswald doesn’t mean code in the narrow sense of “commands fed into a computer” but in a much broader sense of all encoded processes humans have come up with. His go-to example is the cooking recipe.
The Code Economy describes the evolution of human productive activity from simplicity to complexity over the span of more than 40,000 years. I call this evolutionary process the advance of code.
I find the cooking example a bit cutesy, but otherwise it gets the job done.
How… have we humans managed to get where we are today despite our abundant failings, including wars, famine, and a demonstrably meager capacity for society-wide planning and coordination? … by developing productive activities that evolve into regular routines and standardized platforms–which is to say that we have survived, and thrived, by creating and advancing code.
There’s so much in this book that almost every sentence bears discussion. First, as I’ve noted before, social organization appears to be a spontaneous emergent feature of every human group. Without even really meaning to, humans just naturally seem compelled organize themselves. One day you’re hanging out with your friends, riding motorcycles, living like an outlaw, and the next thing you know you’re using the formal legal system to sue a toy store for infringement of your intellectual property.
At the same time, our ability to organize society at the national level is completely lacking. As one of my professors once put it, “God must hate communists, because every time a country goes communist, an “act of god” occurs and everyone dies.”
It’s a mystery why God hates communists so much, but hate ’em He does. Massive-scale social engineering is a total fail and we’ll still be suffering the results for a long time.
This creates a kind of conflict, because people can look at the small-scale organizing they do, and they look at large-scale disorganization, and struggle to understand why the small stuff can’t simply be scaled up.
And yet… society still kind of works. I can go to the grocery store and be reasonably certain that by some magical process, fresh produce has made its way from fields in California to the shelf in front of me. By some magical process, I can wave a piece of plastic around and use it to exchange enough other, unseen goods to pay for my groceries. I can climb into a car I didn’t build and cruise down a network of streets and intersections, reasonably confident that everyone else driving their own two-ton behemoth at 60 miles an hour a few feet away from me has internalized the same rules necessary for not crashing into me. Most of the time. And I can go to the gas station and pour a miracle liquid into my car and the whole system works, whether or not I have any clue how all of the parts manage to come together and do so.
The result is a miracle. Modern society is a miracle. If you don’t believe me, try using an outhouse for a few months. Try carrying all of your drinking water by hand from the local stream and chopping down all of the wood you need to boil it to make it potable. Try fighting off parasites, smallpox, or malaria without medicine or vaccinations. For all my complaints (and I know I complain a lot,) I love civilization. I love not worrying about cholera, crop failure, or dying from cavities. I love air conditioning, refrigerators, and flush toilets. I love books and the internet and domesticated strawberries. All of these are things I didn’t create and can’t take credit for, but get to enjoy nonetheless. I have been blessed.
But at the same time, “civilization” isn’t equally distributed. Millions (billions?) of the world’s peoples don’t have toilets, electricity, refrigerators, or even a decent road from their village to the next.
Auerswald is a passionate champion of code. His answer to unemployment problems is probably “learn to code,” but in such a broad, metaphorical way that encompasses so many human activities that we can probably forgive him for it. One thing he doesn’t examine is why code takes off in some places but not others. Why is civilization more complex in Hong Kong than in Somalia? Why does France boast more Fields Medalists than the DRC?
In our next book (Niall Ferguson’s The Great Degeneration,) we’ll discuss whether specific structures like legal and tax codes can affect how well societies grow and thrive (spoiler alert: they do, just see communism,) and of course you are already familiar with the Jared Diamond environmentalist theory that folks in some parts of the world just had better natural resources to work than in other parts (also true, at least in some cases. I’m not expecting some great industry to get up and running on its own in the arctic.)
But laying these concerns aside, there are obviously other broad factors at work. A map of GDP per capita looks an awful lot like a map of average IQs, with obvious caveats about the accidentally oil-rich Saudis and economically depressed ex-communists.
Auerswald believes that the past 40,000 years of code have not been disasters for the human race, but rather a cascade of successes, as each new invention and expansion to our repertoir of “recipes” or “codes” has enabled a whole host of new developments. For example, the development of copper tools didn’t just put flint knappers out of business, it also opened up whole new industries because you can make more varieties of tools out of copper than flint. Now we had copper miners, copper smelters (a new profession), copper workers. Copper tools could be sharpened and, unlike stone, resharpened, making copper tools more durable. Artists made jewelry; spools of copper wires became trade goods, traveling long distances and stimulating the prehistoric “economy.” New code bequeaths complexity and even more code, not mass flint-knapper unemployment.
Likewise, the increase in reliable food supply created by farming didn’t create mass hunter-gatherer unemployment, but stimulated the growth of cities and differentiation of humans into even more professions, like weavers, cobblers, haberdashers, writers, wheelwrights, and mathematicians.
It’s a hopeful view, and I appreciate it in these anxious times.
But it’s very easy to say that the advent of copper or bronze or agriculture was a success because we are descended from the people who succeeded. We’re not descended from the hunter-gatherers who got displaced or wiped out by agriculturalists. In recent cases where hunter-gatherer or herding societies were brought into the agriculturalist fold, the process has been rather painful.
Elizabeth Marshall Thomas’s The Harmless People, about the Bushmen of the Kalahari, might overplay the romance and downplay the violence, but the epilogue’s description of how the arrival of “civilization” resulted in the deaths and degradation of the Bushmen brought tears to my eyes. First they died of dehydration because new fences erected to protect “private property” cut them off from the only water. No longer free to pursue the lives they had lived for centuries, they were moved onto what are essentially reservations and taught to farm and herd. Alcoholism and violence became rampant.
Among the book’s many characters was a man who had lost most of his leg to snakebite. He suffered terribly as his leg rotted away, cared for by his wife and family who brought him food. Eventually, with help, he healed and obtained a pair of crutches, learned to walk again, and resumed hunting: providing for his family.
And then in “civilization” he was murdered by one of his fellow Bushmen.
It’s a sad story and there are no easy answers. Bushman life is hard. Most people, when given the choice, seem to pick civilization. But usually we aren’t given a choice. The Bushmen weren’t. Neither were factory workers who saw their jobs automated and outsourced. Some Bushmen will adapt and thrive. Nelson Mandela was part Bushman, and he did quite well for himself. But many will suffer.
What to do about the suffering of those left behind–those who cannot cope with change, who do not have the mental or physical capacity to “learn to code” or otherwise adapt remains an unanswered question. Humanity might move on without them, ignoring their suffering because we find them undeserving of compassion–or we might get bogged down trying to save them all. Perhaps we can find a third route: sympathy for the unfortunate without encouraging obsolete behavior?
In The Great Degeneration, Ferguson wonders why the systems (“code”) that supports our society appears to be degenerating. I have a crude but answer: people are getting stupider. It takes a certain amount of intelligence to run a piece of code. Even a simple task like transcribing numbers is better performed by a smarter person than a dumber person, who is more likely to accidentally write down the wrong number. Human systems are built and executed by humans, and if the humans in them are less intelligent than the ones who made them, then they will do a bad job of running the systems.
Unfortunately for those of us over in civilization, dysgenics is a real thing:
Whether you blame IQ itself or the number of years smart people spend in school, dumb people have more kids (especially the parents of the Baby Boomers.) Epigone here only looks at white data (I believe Jayman has the black data and it’s just as bad, if not worse.)
Of course we can debate about the Flynn effect and all that, but I suspect there two competing things going on: First, a rising 50’s economic tide lifted all boats, making everyone healthier and thus smarter and better at taking IQ tests and making babies, and second, declining infant mortality since the late 1800s and possibly the Welfare state made it easier for the children of the poorest and least capable parents to survive.
The effects of these two trends probably cancel out at first, but after a while you run out of Flynn effect (maybe) and then the other starts to show up. Eventually you get Greece: once the shining light of Civilization, now defaulting on its loans.
Well, we have made it a page in!
What do you think of the book? Have you finished it yet? What do you think of the way Auersbach conceptualizes of “code” and its basis as the building block of pretty much all human activity? Do you think Auersbach is essentially correct to be hopeful about our increasingly code-driven future, or should we beware of the tradeoffs to individual autonomy and freedom inherent in becoming a glorified colony of ants?
In previous posts, we discussed the evolution of Whites and Asians, so today we’re taking a look at people from Sub-Saharan Africa.
Modern humans only left Africa about 100,000 to 70,000 yeas ago, and split into Asians and Caucasians around 40,000 years ago. Their modern appearances came later–white skin, light hair and light eyes, for example, only evolved in the past 20,000 and possibly within the past 10,000 years.
What about the Africans, or specifically, Sub-Saharans? (North Africans, like Tunisians and Moroccans, are in the Caucasian clade.) When did their phenotypes evolve?
The Sahara, an enormous desert about the size of the United States, is one of the world’s biggest, most ancient barriers to human travel. The genetic split between SSAs and non-SSAs, therefore, is one of the oldest and most substantial among human populations. But there are even older splits within Africa–some of the ancestors of today’s Pygmies and Bushmen may have split off from other Africans 200,000-300,000 years ago. We’re not sure, because the study of archaic African DNA is still in its infancy.
The Bushmen present an interesting case, because their skin is quite light (for Africans.) I prefer to call it golden. The nearby Damara of Namibia, by contrast, are one of the world’s darkest peoples. (The peoples of South Sudan, eg Malik Agar, may be darker, though.) The Pygmies are the world’s shortest peoples; the peoples of South Sudan, such as the Dinka and Shiluk, are among the world’s tallest.
Sub-Saharan Africa’s ethnic groups can be grouped, very broadly, into Bushmen, Pygmies, Bantus (aka Niger-Congo), Nilotics, and Afro-Asiatics. Bushmen and Pygmies are extremely small groups, while Bantus dominate the continent–about 85% of Sub Saharan Africans speak a language from the Niger-Congo family. The Afro-Asiatic groups, as their name implies, have had extensive contact with North Africa and the Middle East.
Most of America’s black population hails from West Africa–that is, the primarily Bantu region. The Bantus and similar-looking groups among the Nilotics and Afro-Asiatics (like the Hausa) are, therefore, have both Africa’s most iconic and most common phenotypes.
For the sake of this post, we are not interested in the evolution of traits common to all humans, such as bipedalism. We are only interested in those traits generally shared by most Sub-Saharans and generally not shared by people outside of Africa.
One striking trait is black hair: it is distinctively “curly” or “frizzy.” Chimps and gorrilas do not have curly hair. Neither do whites and Asians. (Whites and Asians, therefore, more closely resemble chimps in this regard.) Only Africans and a smattering of other equatorial peoples like Melanesians have frizzy hair.
Black skin is similarly distinct. Chimps, who live in the shaded forest and have fur, do not have high levels of melanin all over their bodies. While chimps naturally vary in skin tone, an unfortunate, hairless chimp is practically “white.”
Humans therefore probably evolved both black skin and frizzy hair at about the same time–when we came out of the shady forests and began running around on the much sunnier savannahs. Frizzy hair seems well-adapted to cooling–by standing on end, it lets air flow between the follicles–and of course melanin is protective from the sun’s rays. (And apparently, many of the lighter-skinned Bushmen suffer from skin cancer.)
Steatopygia also comes to mind, though I don’t know if anyone has studied its origins.
According to Wikipedia, additional traits common to Sub-Saharan Africans include:
Modern cross-analysis of osteological variables and genome-wide SNPs has identified specific genes, which control this craniofacial development. Of these genes, DCHS2, RUNX2, GLI3, PAX1 and PAX3 were found to determine nasal morphology, whereas EDAR impacts chin protrusion. …
Ashley Montagu lists “neotenous structural traits in which…Negroids [generally] differ from Caucasoids… flattish nose, flat root of the nose, narrower ears, narrower joints, frontal skull eminences, later closure of premaxillarysutures, less hairy, longer eyelashes, [and] cruciform pattern of second and third molars.”
As hominids gradually lost their fur (between 4.5 and 2 million years ago) to allow for better cooling through sweating, their naked and lightly pigmented skin was exposed to sunlight. In the tropics, natural selection favoured dark-skinned human populations as high levels of skin pigmentation protected against the harmful effects of sunlight. Indigenous populations’ skin reflectance (the amount of sunlight the skin reflects) and the actual UV radiation in a particular geographic area is highly correlated, which supports this idea. Genetic evidence also supports this notion, demonstrating that around 1.2 million years ago there was a strong evolutionary pressure which acted on the development of dark skin pigmentation in early members of the genus Homo.…
About 7 million years ago human and chimpanzee lineages diverged, and between 4.5 and 2 million years ago early humans moved out of rainforests to the savannas of East Africa. They not only had to cope with more intense sunlight but had to develop a better cooling system. …
Skin colour is a polygenic trait, which means that several different genes are involved in determining a specific phenotype. …
Data collected from studies on MC1R gene has shown that there is a lack of diversity in dark-skinned African samples in the allele of the gene compared to non-African populations. This is remarkable given that the number of polymorphisms for almost all genes in the human gene pool is greater in African samples than in any other geographic region. So, while the MC1Rf gene does not significantly contribute to variation in skin colour around the world, the allele found in high levels in African populations probably protects against UV radiation and was probably important in the evolution of dark skin.
Skin colour seems to vary mostly due to variations in a number of genes of large effect as well as several other genes of small effect (TYR, TYRP1, OCA2, SLC45A2, SLC24A5, MC1R, KITLG and SLC24A4). This does not take into account the effects of epistasis, which would probably increase the number of related genes.Variations in the SLC24A5 gene account for 20–25% of the variation between dark and light skinned populations of Africa, and appear to have arisen as recently as within the last 10,000 years. The Ala111Thr or rs1426654 polymorphism in the coding region of the SLC24A5 gene reaches fixation in Europe, and is also common among populations in North Africa, the Horn of Africa, West Asia, Central Asia and South Asia.
That’s rather interesting about MC1R. It could imply that the difference in skin tone between SSAs and non-SSAs is due to active selection in Blacks for dark skin and relaxed selection in non-Blacks, rather than active selection for light skin in non-Blacks.
MC1R is one of the key proteins involved in regulating mammalianskin and hair color. …It works by controlling the type of melanin being produced, and its activation causes the melanocyte to switch from generating the yellow or red phaeomelanin by default to the brown or black eumelanin in replacement. …
This is consistent with active selection being necessary to produce dark skin, and relaxed selection producing lighter tones.
Studies show the MC1R Arg163Gln allele has a high frequency in East Asia and may be part of the evolution of light skin in East Asian populations. No evidence is known for positive selection of MC1R alleles in Europe and there is no evidence of an association between MC1R and the evolution of light skin in European populations. The lightening of skin color in Europeans and East Asians is an example of convergent evolution.
Dark-skinned people living in low sunlight environments have been recorded to be very susceptible to vitamin D deficiency due to reduced vitamin D synthesis. A dark-skinned person requires about six times as much UVB than lightly pigmented persons.
In Reconstructing Prehistoric African Population Structure, Skoglund et al assembled genetic data from 16 prehistoric Africans and compared them to DNA from nearby present-day Africans. They found:
The ancestors of the Bushmen (aka the San/KhoiSan) once occupied a much wider area.
They contributed about 2/3s of the ancestry of ancient Malawi hunter-gatherers (around 8,100-2,500 YA)
Contributed about 1/3 of the ancestry of ancient Tanzanian hunter-gatherers (around 1,400 YA)
Farmers (Bantus) spread from west Africa, completely replacing hunter-gatherers in some areas
Modern Malawians are almost entirely Bantu.
A Tanzanian pastoralist population from 3,100 YA spread out across east Africa and into southern Africa
Bushmen ancestry was not found in modern Hadza, even though they are hunter-gatherers and speak a click language like the Bushmen.
The Hadza more likely derive most of their ancestry from ancient Ethiopians
Modern Bantu-speakers in Kenya derive from a mix between western Africans and Nilotics around 800-400 years ago.
Middle Eastern (Levant) ancestry is found across eastern Africa from an admixture event that occurred around 3,000 YA, or around the same time as the Bronze Age Collapse.
A small amount of Iranian DNA arrived more recently in the Horn of Africa
Ancient Bushmen were more closely related to modern eastern Africans like the Dinka (Nilotics) and Hadza than to modern west Africans (Bantus),
This suggests either complex relationships between the groups or that some Bantus may have had ancestors from an unknown group of humans more ancient than the Bushmen.
Modern Bushmen have been evolving darker skins
Pygmies have been evolving shorter stature
I missed #12-13 on my previous post about this paper, though I did note that the more data we get on ancient African groups, the more likely I think we are to find ancient admixture events. If humans can mix with Neanderthals and Denisovans, then surely our ancestors could have mixed with Ergaster, Erectus, or whomever else was wandering around.
#15 is interesting, and consistent with the claim that Bushmen suffer from a lot of skin cancer–before the Bantu expansion, they lived in far more forgiving climates than the Kalahari desert. But since Bushmen are already lighter than their neighbors, this begs the question of how light their ancestors–who had no Levantine admixture–were. Could the Bantus’ and Nilotics’ darker skins have evolved after the Bushmen/everyone else split?
Meanwhile, in Loci Associated with Skin Pigmentation Identified in African Populations, Crawford et al used genetic samples from 1,570 people from across Africa to find six genetic areas–SLC24A5, MFSD12, DDB1, TMEM138, OCA2 and HERC2–which account for almost 30% of the local variation in skin color.
SLC24A5 is a light pigment introduced to east Africa from the Levant, probably around 3,000 years ago. Today, it is common in Ethiopia and Tanzania.
Interestingly, according to the article, “At all other loci, variants associated with dark pigmentation in Africans are identical by descent in southern Asian and Australo-Melanesian populations.”
These are the world’s other darkest peoples, such as the Jarawas of the Andaman Islands or the Melanesians of Bougainville, PNG. (And, I assume, some groups from India such as the Tamils.) This implies that these groups 1. had dark skin already when they left Africa, and 2. Never lost it on their way to their current homes. (If they had gotten lighter during their journey and then darkened again upon arrival, they likely would have different skin color variants than their African cousins.)
This implies that even if the Bushmen split off (around 200,000-300,000 YA) before dark skin evolved, it had evolved by the time people left Africa and headed toward Australia (around 100,000-70,000 YA.) This gives us a minimum threshold: it most likely evolved before 70,000 YA.
(But as always, we should be careful because perhaps there are even more skin color variant that we don’t know about yet in these populations.)
MFSD12 is common among Nilotics and is related to darker skin.
Further, the alleles associated with skin pigmentation at all loci but SLC24A5 are ancient, predating the origin of modern humans. The ancestral alleles at the majority of predicted causal SNPs are associated with light skin, raising the possibility that the ancestors of modern humans could have had relatively light skin color, as is observed in the San population today.
The full article is not out yet, so I still don’t know when all of these light and dark alleles emerged, but the order is absolutely intriguing. For now, it looks like this mystery will still have to wait.
It was only two years ago that researchers found the first ancient human genome in Africa: a skeleton in a cave in Ethiopia yielded DNA that turned out to be 4,500 years old.
On Thursday, an international team of scientists reported that they had recovered far older genes from bone fragments in Malawi dating back 8,100 years. The researchers also retrieved DNA from 15 other ancient people in eastern and southern Africa, and compared the genes to those of living Africans.
We assembled genome-wide data from 16 prehistoric Africans. We show that the anciently divergent lineage that comprises the primary ancestry of the southern African San had a wider distribution in the past, contributing approximately two-thirds of the ancestry of Malawi hunter-gatherers ∼8,100–2,500 years ago and approximately one-third of the ancestry of Tanzanian hunter-gatherers ∼1,400 years ago.
The San are also known as the Bushmen, a famous group of recent hunter-gatherers from southern Africa.
We document how the spread of farmers from western Africa involved complete replacement of local hunter-gatherers in some regions…
…and we track the spread of herders by showing that the population of a ∼3,100-year-old pastoralist from Tanzania contributed ancestry to people from northeastern to southern Africa, including a ∼1,200-year-old southern African pastoralist…
Whereas the two individuals buried in ∼2,000 BP hunter-gatherer contexts in South Africa share ancestry with southern African Khoe-San populations in the PCA, 11 of the 12 ancient individuals who lived in eastern and south-central Africa between ∼8,100 and ∼400 BP form a gradient of relatedness to the eastern African Hadza on the one hand and southern African Khoe-San on the other (Figure 1A).
The Hadza are a hunter-gatherer group from Tanzania who are not obviously related to any other people. Their language has traditionally been classed alongside the languages of the KhoiSan/Bushmen people because they all contain clicks, but the languages otherwise have very little in common and Hadza appears to be a language isolate, like Basque.
The genetic cline correlates to geography, running along a north-south axis with ancient individuals from Ethiopia (∼4,500 BP), Kenya (∼400 BP), Tanzania (both ∼1,400 BP), and Malawi (∼8,100–2,500 BP), showing increasing affinity to southern Africans (both ancient individuals and present-day Khoe-San). The seven individuals from Malawi show no clear heterogeneity, indicating a long-standing and distinctive population in ancient Malawi that persisted for at least ∼5,000 years (the minimum span of our radiocarbon dates) but which no longer exists today. …
We find that ancestry closely related to the ancient southern Africans was present much farther north and east in the past than is apparent today. This ancient southern African ancestry comprises up to 91% of the ancestry of Khoe-San groups today (Table S5), and also 31% ± 3% of the ancestry of Tanzania_Zanzibar_1400BP, 60% ± 6% of the ancestry of Malawi_Fingira_6100BP, and 65% ± 3% of the ancestry of Malawi_Fingira_2500BP (Figure 2A). …
Both unsupervised clustering (Figure 1B) and formal ancestry estimation (Figure 2B) suggest that individuals from the Hadza group in Tanzania can be modeled as deriving all their ancestry from a lineage related deeply to ancient eastern Africans such as the Ethiopia_4500BP individual …
So what’s up with the Tanzanian expansion mentioned in the summary?
Western-Eurasian-related ancestry is pervasive in eastern Africa today … and the timing of this admixture has been estimated to be ∼3,000 BP on average… We found that the ∼3,100 BP individual… associated with a Savanna Pastoral Neolithic archeological tradition, could be modeled as having 38% ± 1% of her ancestry related to the nearly 10,000-year-old pre-pottery farmers of the Levant … These results could be explained by migration into Africa from descendants of pre-pottery Levantine farmers or alternatively by a scenario in which both pre-pottery Levantine farmers and Tanzania_Luxmanda_3100BP descend from a common ancestral population that lived thousands of years earlier in Africa or the Near East. We fit the remaining approximately two-thirds of Tanzania_Luxmanda_3100BP as most closely related to the Ethiopia_4500BP…
…present-day Cushitic speakers such as the Somali cannot be fit simply as having Tanzania_Luxmanda_3100BP ancestry. The best fitting model for the Somali includes Tanzania_Luxmanda_3100BP ancestry, Dinka-related ancestry, and 16% ± 3% Iranian-Neolithic-related ancestry (p = 0.015). This suggests that ancestry related to the Iranian Neolithic appeared in eastern Africa after earlier gene flow related to Levant Neolithic populations, a scenario that is made more plausible by the genetic evidence of admixture of Iranian-Neolithic-related ancestry throughout the Levant by the time of the Bronze Age …and in ancient Egypt by the Iron Age …
There is then a discussion of possible models of ancient African population splits (were the Bushmen the first? How long have they been isolated?) I suspect the more ancient African DNA we uncover, the more complicated the tree will become, just as in Europe and Asia we’ve discovered Neanderthal and Denisovan admixture.
They also compared genomes to look for genetic adaptations and found evidence for selection for taste receptors and “response to radiation” in the Bushmen, which the authors note “could be due to exposure to sunlight associated with the life of the ‡Khomani and Ju|’hoan North people in the Kalahari Basin, which has become a refuge for hunter-gatherer populations in the last millenia due to encroachment by pastoralist and agriculturalist groups.”
(The Bushmen are lighter than Bantus, with a more golden or tan skin tone.)
They also found evidence of selection for short stature among the Pygmies (which isn’t really surprising to anyone, unless you thought they had acquired their heights by admixture with another very short group of people.)
Overall, this is a great paper and I encourage you to RTWT, especially the pictures/graphs.
Examining ethnically diverse African genomes, we identify variants in or near SLC24A5, MFSD12, DDB1, TMEM138, OCA2 and HERC2 that are significantly associated with skin pigmentation. Genetic evidence indicates that the light pigmentation variant at SLC24A5 was introduced into East Africa by gene flow from non-Africans. At all other loci, variants associated with dark pigmentation in Africans are identical by descent in southern Asian and Australo-Melanesian populations. Functional analyses indicate that MFSD12 encodes a lysosomal protein that affects melanogenesis in zebrafish and mice, and that mutations in melanocyte-specific regulatory regions near DDB1/TMEM138 correlate with expression of UV response genes under selection in Eurasians.
I’ve had an essay on the evolution of African skin tones sitting in my draft folder for ages because this research hadn’t been done. There’s plenty of research on European and Asian skin tones (skin appears to have significantly lightened around 10,000 years ago in Europeans,) but much less on Africans. Luckily for me, this paper fixes that.
Looks like SLC24A5 is related to that Levantine/Iranian back-migration into Africa documented in the first paper.
Welcome back to our discussion of recent exciting advances in our knowledge of human evolution:
Ancient hominins in the US?
Humans evolved in Europe?
In two days, first H Sap was pushed back to 260,000 years,
then to 300,000 years!
Bell beaker paper
As we’ve been discussing for the past couple of weeks, the exact dividing line between “human” and “non-human” isn’t always hard and fast. The very first Homo species, such as Homo habilis, undoubtedly had more in common with its immediate Australopithecine ancestors than with today’s modern humans, 3 million years later, but that doesn’t mean these dividing lines are meaningless. Homo sapiens and Homo neandethalensis, while considered different species, interbred and produced fertile offspring (most non-Africans have 3-5% Neanderthal DNA as a result of these pairings;) by contrast, humans and chimps cannot produce fertile offspring, because humans and chimps have a different number of chromosomes. The genetic distance between the two groups is just too far.
The grouping of ancient individuals into Homo or not-Homo, Erectus or Habilis, Sapiens or not, is partly based on physical morphology–what they looked like, how they moved–and partly based on culture, such as the ability to make tools or control fire. While australopithecines made some stone tools (and chimps can make tools out of twigs to retrieve tasty termites from nests,) Homo habilis (“handy man”) was the first to master the art and produce large numbers of more sophisticated tools for different purposes, such as this Oldowan chopper.
But we also group species based on moral or political beliefs–scientists generally believe it would be immoral to say that different modern human groups belong to different species, and so the date when Homo ergaster transforms into Homo sapiens is dependent on the date when the most divergent human groups alive today split apart–no one wants to come up with a finding that will get trumpeted in media as “Scientists Prove Pygmies aren’t Human!” (Pygmies already have enough problems, what with their immediate neighbors actually thinking they aren’t human and using their organs for magic rituals.)
(Of course they would still be Human even if they part of an ancient lineage.)
But if an ecologically-minded space alien arrived on earth back in 1490 and was charged with documenting terrestrial species, it might easily decide–based on morphology, culture, and physical distribution–that there were several different Homo “species” which all deserve to be preserved.
But we are not space aliens, and we have the concerns of our own day.
So when a paper was published last year on archaic admixture in Pygmies and the Pygmy/Bushmen/everyone else split, West Hunter noted the authors used a fast–but discredited–estimate of mutation rate to avoid the claim that Pygmies split off 300,000 years ago, 100,000 years before the emergence of Homo sapiens:
There are a couple of recent papers on introgression from some quite divergent archaic population into Pygmies ( this also looks to be the case with Bushmen). Among other things, one of those papers discussed the time of the split between African farmers (Bantu) and Pygmies, as determined from whole-genome analysis and the mutation rate. They preferred to use the once-fashionable rate of 2.5 x 10-8 per-site per-generation (based on nothing), instead of the new pedigree-based estimate of about 1.2 x 10-8 (based on sequencing parents and child: new stuff in the kid is mutation). The old fast rate indicates that the split between Neanderthals and modern humans is much more recent than the age of early Neanderthal-looking skeletons, while the new slow rate fits the fossil record – so what’s to like about the fast rate? Thing is, using the slow rate, the split time between Pygmies and Bantu is ~300k years ago – long before any archaeological sign of behavioral modernity (however you define it) and well before the first known fossils of AMH (although that shouldn’t bother anyone, considering the raggedness of the fossil record).
Southern Africa is consistently placed as one of the potential regions for the evolution of Homo sapiens. To examine the region’s human prehistory prior to the arrival of migrants from East and West Africa or Eurasia in the last 1,700 years, we generated and analyzed genome sequence data from seven ancient individuals from KwaZulu-Natal, South Africa. Three Stone Age hunter-gatherers date to ~2,000 years ago, and we show that they were related to current-day southern San groups such as the Karretjie People. Four Iron Age farmers (300-500 years old) have genetic signatures similar to present day Bantu-speakers. The genome sequence (13x coverage) of a juvenile boy from Ballito Bay, who lived ~2,000 years ago, demonstrates that southern African Stone Age hunter-gatherers were not impacted by recent admixture; however, we estimate that all modern-day Khoekhoe and San groups have been influenced by 9-22% genetic admixture from East African/Eurasian pastoralist groups arriving >1,000 years ago, including the Ju|’hoansi San, previously thought to have very low levels of admixture. Using traditional and new approaches, we estimate the population divergence time between the Ballito Bay boy and other groups to beyond 260,000 years ago.
260,000 years! Looks like West Hunter was correct, and we should be looking at the earlier Pygmy divergence date, too.
Fossil evidence points to an African origin of Homo sapiens from a group called either H. heidelbergensis or H. rhodesiensis. However, the exact place and time of emergence of H. sapiens remain obscure … In particular, it is unclear whether the present day ‘modern’ morphology rapidly emerged approximately 200 thousand years ago (ka) among earlier representatives of H. sapiens1 or evolved gradually over the last 400 thousand years2. Here we report newly discovered human fossils from Jebel Irhoud, Morocco, and interpret the affinities of the hominins from this site with other archaic and recent human groups. We identified a mosaic of features including facial, mandibular and dental morphology that aligns the Jebel Irhoud material with early or recent anatomically modern humans and more primitive neurocranial and endocranial morphology. In combination with an age of 315 ± 34 thousand years (as determined by thermoluminescence dating)3, this evidence makes Jebel Irhoud the oldest and richest African Middle Stone Age hominin site that documents early stages of the H. sapiens clade in which key features of modern morphology were established.
Hublin–one of the study’s coauthors–notes that between 330,000 and 300,000 years ago, the Sahara was green and animals could range freely across it.
While the Moroccan fossils do look like modern H sapiens, they also still look a lot like pre-sapiens, and the matter is still up for debate. Paleoanthropologist Chris Stringer suggests that we should consider all of our ancestors after the Neanderthals split off to be Homo sapiens, which would make our species 500,000 years old. Others would undoubtedly prefer to use a more recent date, arguing that the physical and cultural differences between 500,000 year old humans and today’s people are too large to consider them one species.
According to the Atlantic:
[The Jebel Irhoud] people had very similar faces to today’s humans, albeit with slightly more prominent brows. But the backs of their heads were very different. Our skulls are rounded globes, but theirs were lower on the top and longer at the back. If you saw them face on, they could pass for a modern human. But they turned around, you’d be looking at a skull that’s closer to extinct hominids like Homo erectus. “Today, you wouldn’t be able to find anyone with a braincase that shape,” says Gunz.
Their brains, though already as large as ours, must also have been shaped differently. It seems that the size of the human brain had already been finalized 300,000 years ago, but its structure—and perhaps its abilities—were fine-tuned over the subsequent millennia of evolution.
No matter how we split it, these are exciting days in the field!
Obviously I read a lot of anthropology. It’s a topic near and dear to my heart. Some anthropological works are really good (these I try to share with you here.) Others are drek. (Sometimes I share these, too–but in the spirit of, “Ew, this tastes really weird… Here, try some!” Goodness only knows why people do that.)
In my opinion, anthropology has two main purposes:
To document human cultures, with priority given to those at greatest risk of disappearing
To make human cultures mutually understandable.
I’m reminded here of the response Napoleon Chagnon gave when asked what the Yanomamo thought he was doing, studying their tribe:
“They arrived at their own conclusion, which I thought was very logical: I’m trying to learn how to become human.” –Napoleon Chagnon
So let’s add #3: Learn what it means to be human.
Some anthropologists specialize in #1. Others are talented at #2. A few can do both. Collectively, the enterprise might get us to #3.
For example, many anthropologists have amassed reams of data on kinship structures, marriage taboos, food/wealth distribution, economic systems (eg hunter-gathering, pastoralism, etc.) If you want to know whether the average milch pastoralist thinks cousin marriage is a good idea, an anthropologist probably has the answer. That’s task #1.
But information doesn’t do much good if it just molders away in some dusty back room of a university library, and the average person doesn’t want to read an anthropologist’s field notes. This is where good writing comes in–crafting an enjoyable, accessible ethnography, like Kabloona, which gives the average reader some insight into another culture. That’s task #2.
Anthropology isn’t supposed to be politicized, but in practice it’s difficult not to get sucked into politics. Anthropologists generally become quite fond of the people they’ve studied and lived with for years. Since they prioritize cultures in danger of disappearing, they end up with both practical and sentimental reasons to side against the more powerful groups in the area–no anthropologist wants to see the people he just spent a decade living with starve to death because a mining company moved into the area and dug up their banana farms.
As a result, the anthropologist often becomes a liaison between the people he studies and the broader world he wants to protect them from.
Additionally, like the quantum physicist, the anthropologist changes the society he studies merely by being present in it. He is an outsider, a person with his own ideas about morality, violence, gender relations, education, money, etc., and moreover, entirely alien to the local economic and social system. He cannot simply slip, unnoticed, into village life without disrupting it in some way–this is the existential problem of anthropology, but since it cannot be solved, (and the wider culture has no qualms about disrupting native life in far larger and more damaging ways, like bulldozing it,) as a practical matter it must simply be laid aside.
One thing anthropologists tend not to do is look very closely at the negatives of the societies they study, such as disease, infant mortality, drug abuse, or violence. After all, who wants to produce a book that boils down to, “I studied these people, and they were brutish, nasty, and unpleasant”?
Let’s compare for a moment two classic works: Elizabeth Thomas’s The Harmless People, whose very title lays out her assertion that the Bushmen are less violent and less capable of killing people than other, more technologically advanced peoples; and Chagnon’s Yanomamo: The Fierce People.
When Chagnon began publishing his observations, some cultural anthropologists who could not accept an evolutionary basis for human behavior refused to believe them. Chagnon became perhaps the most famous American anthropologist since Margaret Mead—and the most controversial. He was attacked in a scathing popular book, whose central allegation that he helped start a measles epidemic among the Yanomamö was quickly disproven, and the American Anthropological Association condemned him, only to rescind its condemnation after a vote by the membership. Throughout his career Chagnon insisted on an evidence-based scientific approach to anthropology, even as his professional association dithered over whether it really is a scientific organization.
Thomas does not bother to offer numerical proof of her claims that Bushmen are more peaceful than other groups, but anyone with a mind for numbers can look at the murders she does report, divide by the number of Bushmen, and conclude that homicide rates are most likely higher in Bushman society than ours.
Of course, Thomas has not been castigated and condemned by the AAA for asserting that first world societies are more homicidal than third-world hunter-gatherers without proof.
It would be simplistic to assert that Marxists and Freudians produce bad anthropology; I am sure they would have equally negative things to say about people like me. Rather, the dominance of anthropology by adherents of any particular political ideology is problematic.
(Anthropologists also tend not to examine very critically the reasons people might want to change their societies.)
The second big problem with anthropology is that most “primitive” societies have disappeared or are mere remnants of their former selves. 100 years ago, we didn’t know there were people living in the middle of Papua New Guinea (and the folks there, I gather, didn’t know about the rest of us.) There were still cannibals, uncontacted tribes of hunter-gatherers, and igloo-dwelling Eskimo. Atlases still had blank spots marked “unexplored.”
By the time Thomas wrote “The Harmless People,” the Bushmen were disappearing. Indeed, the book’s epilogue, in which a private land owner fences off a watering hole where the Bushmen had formerly drunk in the dry season, leading several tribe members to die of thirst, followed by the remaining tribe members’ removal to a settlement, where all of the vices of alcoholism and violence set in, makes for difficult reading.
What’s a modern anthropologist to do? Sure, you could write an incredibly depressing ethnography on the ways traditional lifestyles are disappearing, or you could write a dissertation on the intersection of hip-hop culture and queer identity. (And you can do that without spending ten years in some third-world village with malaria and no internet.)
The result of all of this is that anthropologists sometimes stick their noses where they don’t belong, for purely political reasons. Take, for example, the American Anthropological Association (them again!)’s statement on race:
In the United States both scholars and the general public have been conditioned to viewing human races as natural and separate divisions within the human species based on visible physical differences.
Do babies react differently when they are looking intently at the faces of people of different races?
Psychologist Phyllis Katz has cleverly used habituation to try to answer this question. Katz studied looking patterns among 6-month-old infants. She first showed the babies a series of pictures, each of them was shown a person that was of the same race and gender (e.g., four White women). After four pictures, the babies began to habituate to the pictures, and their attention wavered. Next, Katz showed the babies a picture of a person who was of the same gender but of a different race (e.g., a Black woman), or a picture of a person who was of the same race but of a different gender (e.g., a White man). The logic behind the study was that if the infants didn’t register race or gender, they wouldn’t show a different response to these new pictures– that is, they would continue to show habituation. However, if they registered a difference, the babies should dishabituate, and again look with interest at this new stimulus.
The findings clearly showed that the 6-month-olds dishabituated to both race and gender cues—that is, the infants looked longer at new pictures when the pictures were of someone of a different race or gender. But some other interesting findings emerged. Among these was the finding that for both Black and White infants, the infants attended longer to different race faces when they had habitutated to faces that were of their own race.
Back to the AAA:
Evidence from the analysis of genetics (e.g., DNA) indicates that most physical variation, about 94%, lies within so-called racial groups. Conventional geographic “racial” groupings differ from one another only in about 6% of their genes. This means that there is greater variation within “racial” groups than between them. In neighboring populations there is much overlapping of genes and their phenotypic (physical) expressions. Throughout history whenever different groups have come into contact, they have interbred. The continued sharing of genetic materials has maintained all of humankind as a single species.
Put a dog and a wolf together, and if they don’t kill each other, they’ll breed. Dogs, wolves, dingos, and golden jackals can all interbreed and produce fertile offspring, but we still consider them different species.
I’m not saying human races are actually different species. I’m saying the AAA is full of idiots who parrot popular science articles without understanding the first thing about them. If these are your “scholarly positions,” you don’t fucking deserve your PhDs.
Oh, and by the way, humans don’t always interbreed. Sometimes one group just exterminates the other. Just ask the Dorset–oh wait you can’t. Because they’re all dead.
Physical variations in any given trait tend to occur gradually rather than abruptly over geographic areas.
The fact that “blue” and “green” shade into each other on the rainbow does not mean that blue and green do not exist.
And because physical traits are inherited independently of one another, knowing the range of one trait does not predict the presence of others. For example, skin color varies largely from light in the temperate areas in the north to dark in the tropical areas in the south; its intensity is not related to nose shape or hair texture.
A derived G-allele point mutation (SNP) with pleiotropic effects in EDAR, 370A or rs3827760, found in most modern East Asians and Native Americans but not common in African or European populations, is thought to be one of the key genes responsible for a number of differences between these populations, including the thicker hair, more numerous sweat glands, smaller breasts, and dentition characteristic of East Asians. …The 370A mutation arose in humans approximately 30,000 years ago, and now is found in 93% of Han Chinese and in the majority of people in nearby Asian populations. This mutation is also implicated in ear morphology differences and reduced chin protusion.
Back to AAA:
Dark skin may be associated with frizzy or kinky hair or curly or wavy or straight hair, all of which are found among different indigenous peoples in tropical regions. These facts render any attempt to establish lines of division among biological populations both arbitrary and subjective.
So that’s why it’s so hard to distinguish an African from a Caribbean Indian, said no one ever.
Genetically, of course, the divisions between the Big Three main human clades are quite plain.
…indeed, physical variations in the human species have no meaning except the social ones that humans put on them.
Today scholars in many fields argue that “race” as it is understood in the United States of America was a social mechanism invented during the 18th century to refer to those populations brought together in colonial America: the English and other European settlers, the conquered Indian peoples, and those peoples of Africa brought in to provide slave labor.
People in the past did bad things, so all of their conceptual categories for understanding the world must have been made-up. And evil. There’s no way a European who just met an African and a Native American could have accidentally stumbled on a valid observation about human populations that were historically separated for a long time.
Anyway, the article goes on and on, littered with gems like:
During World War II, the Nazis under Adolf Hitler enjoined the expanded ideology of “race” and “racial” differences and took them to a logical end: the extermination of 11 million people of “inferior races” (e.g., Jews, Gypsies, Africans, homosexuals, and so forth) and other unspeakable brutalities of the Holocaust.
Hear that? If you think there are genetic variations between long-separated human groups, you are basically Hitler and the only logical conclusion is genocide. Because no one ever committed genocide before they invented the idea of race, obviously:
Similarly, the Turko-Mongol conqueror Tamerlane was known for his extreme brutality and his conquests were accompanied by genocidal massacres. William Rubinstein wrote: “In Assyria (1393–4) – Tamerlane got around – he killed all the Christians he could find, including everyone in the, then, Christian city of Tikrit, thus virtually destroying Assyrian Church of the East. Impartially, however, Tamerlane also slaughtered Shi’ite Muslims, Jews and heathens.” Christianity in Mesopotamia was hitherto largely confined to those Assyrian communities in the north who had survived the massacres. Tamerlane also conducted large-scale massacres of Georgian and Armenian Christians, as well as of Arabs, Persians and Turks.
Ancient Chinese texts record that General Ran Min ordered the extermination of the Wu Hu, especially the Jie people, during the Wei–Jie war in the fourth century AD. People with racial characteristics such as high-bridged noses and bushy beards were killed; in total, 200,000 were reportedly massacred.
I’m stopping here. This stuff is politicized drek. It obviously is irrelevant to the vast majority of anthropology (what do I really care if the Inuit are part of the greater Asian clade when I’m just trying to record traditional folk songs?) But this drivel gets served up as the “educated opinions of scholars in the field” (notably, not the field of human genetics) to naive students and they don’t even realize how politically-based it is.
I don’t think anthropologists all need to agree with me about politics, but they should cultivate a healthy interest in science.
In the genomic age, it is now easy to compare the DNA of people from around the world. And it has indeed revealed that our racial categories are fuzzy proxies for genetic difference—an African man may be more closely related to an Asian than to another African.
From there, Zhang basically tries to argue that race doesn’t real even though genetics and medical science sure make it look real, that the differences in the distribution of genetic traits in large, historically isolated populations don’t matter because of a few tiny populations that are the genetic equivalent of the Basque language.
Remember, the world’s entire population of Bushmen wouldn’t even fill the Texas A&M football stadium. Combine them with a few other tiny populations, like the Khoikhoi and Pygmies, and you’re still looking at <1 million people. Meanwhile, there are billions of Europeans, west Africans, and east Asians.
Mundane racial categories work just fine for the vast majority of people, including the vast majority of Americans, who are not drawn from a rainbow of racially-mixed groups like Tuaregs or fringe outliers like the Bushmen, but from distinct populations of West Africans, Europeans (primarily NW Euros,) Native Americans, and East Asians. If I say someone is “black” or “white,” not only do you understand what I mean, there is an actually consistent genetic reality underlying my statements–in almost 100% of cases, a genetic test would in fact confirm that the people I call “black” are actually primarily Sub-Saharan African by ancestry and the people I call “white” are primarily European by ancestry. Exceptions like Rachel Dolezal are quite rare.
Zhang is trying to argue that you can’t make a reasonable argument about the average distribution of traits between whites, blacks, and Asians in the US because there is a handful of tiny, genetically isolated populations over in Africa. A does not follow from B.
On the other side of the coin, we have people who believe it’s morally imperative to only marry people from one’s own race.
Most of the time, people fall in love with people from their own culture and ethnic group. This is what we’d expect, because you’re more likely to meet and share values with people from your own group. (Interestingly, most people are more genetically similar to their spouses than they are to the average person in their community, not because they married a close relative, but because similar genes make for similar people.)
But some people, for whatever reasons, marrying within their own group isn’t a real option. (White men who are under 5’5″, for example.) These people are looking out for their own best interests–really, if you’re considering calling Derbyshire a race traitor, you’re probably thinking too much about other people’s business.
Capitalism works because it self-corrects; it allows consumers to pick the best products at the best prices, and companies to hire the most talented workers for the best wages. Unlike socialism, where companies are told what and how much to produce, consumers are told what to buy and how much it will cost, and ultimately people starve in the streets, capitalism actually works. Self-interest is a powerful organizing principle that has radically increased the welfare of billions of people over the past century.
And capitalism doesn’t care about race.
Where people live in close proximity to people of other races, some of them will fall in love.
That said, don’t date people for status points or because you’re trying to prove how not-racist you are. Like Obama’s parents, most inter-racial couples don’t stay together; the majority of mixed-race children have parents who are not married–according to one study, 92% of biracial children with black fathers are born out of wedlock and 82% end up on government assistance because their fathers do not bother to take care of them.
And if you are ever tempted to compare your vagina to the UN because of the sheer number of different ethnicities that have been in it, you need to stop and re-evaluate your life for multiple reasons.
Ultimately, real-life decisions should be based on real-life concerns.
Note: This post still contains a lot of oversimplification for the sake of explaining a few things.
Welcome back to our discussion of the geographic dispersion of humanity. On Tuesday, we discussed how two great barriers–the Sahara desert and the Himalayas + central Asian desert–have impeded human travelers over the millennia, resulting in three large, fairly well-defined groups of humans, the major races: Sub-Saharan Africans (SSA), Caucasians, and east Asians.
Of course, any astute motorist, having come to a halt at the Asian end of our highway, might observe that there is, in fact, a great deal of land in the world that we have not yet explored. So we head to the local shop and pick up a better map:
Our new map shows us navigational directions for getting to Melanesia and Australia–in ice age times, it instructs us, we can drive most of the way. If there isn’t an ice age, we’ll have to take a boat.
The people of Melanesia and Australia are related, the descendants of one of the first groups of humans to split off from the greater tribe that left Africa some 70k ago.
As the name “Melanesian” implies, they are quite dark-skinned–a result of never having ventured far from the equatorial zone.
Today, they live in eastern Indonesia, Papua New Guinea, Australia, and a smattering of smaller islands. (Notably, the Maori of New Zealand are Polynesians like the Hawaiians, not Melanesians, descendants of a different migration wave that originated in Taiwan.)
There is some speculation that they might have once been wider-spread than they currently are, or that various south-Asian tribes might be related to them, (eg, “A 2009 genetic study in India found similarities among Indian archaic populations and Aboriginal people, indicating a Southern migration route, with expanding populations from Southeast Asia migrating to Indonesia and Australia,”) but I don’t think any mainland group would today be classed as majority Melanesian by DNA.
They may also be related to the scattered tribes of similarly dark-skinned, diminutive people known as the Negritos:
Males from the Aeta people (or Agta) people of The Philippines, are of great interest to genetic, anthropological and historical researchers, as at least 83% of them belong to haplogroup K2b, in the form of its rare primary clades K2b1* and P* (a.k.a. K2b2* or P-P295*). Most Aeta males (60%) carry K-P397 (K2b1), which is otherwise uncommon in the Philippines and is strongly associated with the indigenous peoples of Melanesia and Micronesia. Basal P* is rare outside the Aeta and some other groups within Maritime South East Asia. …
A study of blood groups and proteins in the 1950s suggested that the Andamanese were more closely related to Oceanic peoples than African Pygmies. Genetic studies on Philippine Negritos, based on polymorphic blood enzymes and antigens, showed they were similar to surrounding Asian populations.
However, the Negritos are a very small set of tribes, and I am not confident that they are even significantly related to each other, rather than just some short folks living on a few scattered islands. We must leave them for another day.
The vast majority of Aborigines and Melanesians live in Australia, Papua New Guinea, and nearby islands. They resemble Africans, because they split off from the rest of the out-of-Africa crew long before the traits we now associate with “whites” and “Asians” evolved, and have since stayed near the equator, but they are most closely related to–sharing DNA with–south Asians (and Indians.)
So we have, here, on the genetic level, a funny situation. Melanesians are–relatively speaking–a small group. According to Wikipedia, thee are about 12 million Melanesians and 606,000 Aborigines. By contrast, Tokyo prefecture has 13 million people and the total Tokyo metro area has nearly 38 million. Meanwhile, the Han Chinese–not a race but a single, fairly homogenous ethnic group–number around 1.3 billion.
Of all the world’s peoples, Melanesians/Aborigines are most closely related to other Asians–but this is a distant relationship, and those same Asians are more closely related to Caucasians than to Aborigines.
As I mentioned on Tuesday, the diagram, because it is 1-dimensional, can only show the distance between two groups at a time, not all groups. The genetic distance between Caucasians and Aborigines is about 60 or 50k, while the distance between Asians and Caucasians is around 40k, but the distance between Sub-Saharan Africans and ALL non-SSAs is about 70k, whether they’re in Australia, Patagonia, or France. Our map is not designed to show this distance, only the distances between individual pairs.
Now if we hopped back in our car and zoomed back to the beginning of our trip, pausing to refuel in Lagos, we’d note another small group that has been added to the other end of the map: the Bushmen, aka the Khoi-San people. Wikipedia estimates 90,000 San and doesn’t give an estimate for the Khoi people, but their largest group, the Nama, has about 200,000 people. We’ll estimate the total, therefore, around 500,000 people, just to be safe.
The Bushmen are famous for being among the world’s last hunter-gatherers; their cousins the Khoi people are pastoralists. There were undoubtedly more of them in the past, before both Europeans and Bantus arrived in southern Africa. Some people think Bushmen look a little Asian, due to their lighter complexions than their more equatorial African cousins.
Mitochondrial DNA studies also provide evidence that the San carry high frequencies of the earliest haplogroup branches in the human mitochondrial DNA tree. This DNA is inherited only from one’s mother. The most divergent (oldest) mitochondrial haplogroup, L0d, has been identified at its highest frequencies in the southern African San groups.
In a study published in March 2011, Brenna Henn and colleagues found that the ǂKhomani San, as well as the Sandawe and Hadza peoples of Tanzania, were the most genetically diverse of any living humans studied. This high degree of genetic diversity hints at the origin of anatomically modern humans.
Recent analysis suggests that the San may have been isolated from other original ancestral groups for as much as 100,000 years and later rejoined, re-integrating the human gene pool.
A DNA study of fully sequenced genomes, published in September 2016, showed that the ancestors of today’s San hunter-gatherers began to diverge from other human populations in Africa about 200,000 years ago and were fully isolated by 100,000 years ago … 
So the total distance between Nigerians and Australian Aborogines is 70k years; the distance between Nigerians and Bushmen is at least 100k years.
When we zoom in on the big three–Sub-Saharan Africans, Caucasians, and Asians–they clade quite easily and obviously into three races. But when we add Aborigines and Bushmen, things complicate. Should we have a “race” smaller than the average American city? Or should we just lump them in with their nearest neighbors–Bushmen with Bantus and Aborigines with Asians?
I am fine with doing both, actually–but wait, I’m not done complicating matters! Tune in on Monday for more.
This is the small version, which does not show all the groups. The larger version, with all the groups, is below.
Continuing my quest to produce a handy guide to the many obscure ethnic groups found in Haak et al’s dataset, here are all of the African groups I could fit on a map. Since many of these groups are extremely small and live near each other, it was impossible to fit them into their exact locations, but I hope my approximations are sufficient.
Here’s the more detailed map:
Note that there’s a ton more genetic data in the actual study; this is just a reference map. Also, “Bedouins” have an extremely broad range, from Morocco to Oman, but I think these are the locations where these two samples were taken. Please ask if anything is unclear.
(Remember, creatives are psychotic.)
People have been bugging me to write a post on South Africa ever since I started this blog, more or less, so here you go.
I regard South Africa (SA) as one of the most misunderstood countries in the world, so I’m going to start with the history and try to clear up some potential misconceptions.
Disclaimer: I am not a South Africa scholar. This is what I’ve cobbled together by reading first and second hand accounts on the internet, Wikipedia, talking to friends who’ve lived in SA, etc. Since I’ve never been there myself, there’s always a chance that I’ve trusted the wrong people or come to some incorrect conclusions, but as always, I’ve tried to present an accurate picture.
The most common misconception I run across is that whites arrived recently in SA, conquered and oppressed the natives via apartheid and after years of righteous struggle, the native people of South Africa have finally gotten the right to vote and run their own country.
History, as usual, tells a slightly different story.
The dominant group in South Africa today is the Bantus. Nelson Mandela, for example, was a Bantu.
When the first Europeans arrived at the Cape of Good Hope (later site of Cape Town and most of the economic development of the state of South Africa,) most of the people there were Bushmen, (aka San aka KhoiSan,) who were hunter-gatherers. Not Bantus.
Distribution of ancient paintings and engravings attributed to the San
If you believe that ancestrality determines a person’s right to a country, then the KhoiSan have a right to the Cape, and the Johnny-Come-Latey Bantus do not.
If you haven’t been reading along, you might think that the Bushmen and the Bantus are probably closely related, and that I am merely splitting hairs.
No. The Bantus are more closely related to Koreans, Australian Aborigines, and even Europeans than they are to the Bushmen.
As we’ve discussed before, the Bushmen are one of the world’s most isolated peoples, having split off from the rest of the human population, (or perhaps the rest of the humans split off from them,) 100,000 years or more ago. The Out-of-Africa event only happened 70,000 years ago, so only 70,000 years separates the Bantus from all non-Africans, but 100,000 years separate the Bantus from the San.
So. The original inhabitants of the area, who’d been there for about 100,000 years, were the San. Most of them were hunter-gatherers, which means their population density was really low; much of the area appears to have been uninhabited, given regions with names like “Nomansland”. Some of the Khoi peoples, though, had adopted animal herding.
The Bantus came originally from somewhere up near Nigeria, but by the relevant time period, occupied the north east part of South Africa, which they’d conquered from the San. (The Cape of Good Hope, where the Europeans settled, is in the south west corner. Hardly anyone has ever lived in the north west corner, because it’s desert.)
The first European in the area was Portuguese sailor Bartolomeu Dias, (and, obviously, his crew,) way back in 1488. In 1647, the Dutch built a small fort in the area, and in 1652, the Dutch East India Company (which I wrote about recently,) set up a supply station and fortifications on the Cape. By 1659, the Dutch were producing corn, wine, and babies.
Most of the KhoiSan people were probably killed, either outright by warfare or by diseases they had no resistance to, but I have no numbers and am just speculating. There are still KhoiSan people in SA and neighboring places, so they are not all dead.
By 1800, some of the mixed-race children/descendants of the Dutch and the locals, KhoiSan, former slaves*, and the like decided they’d had enough of the Dutch and migrated northward, establishing Griqualand in an apparently uninhabited area. They migrated around a bit, and eventually Griqualand got moved to the region formerly known as Nomansland.
*The slaves were imported from elsewhere in Africa, since the Dutch considered it a bad idea to enslave the locals.
The British took possession of the Cape during the Napoleonic Wars. They promptly set about outlawing slavery and the Dutch language, so a lot of the Dutch decided to leave, too. By the 1830s, they were leaving by the hundreds, a migration known as the “Great Trek.” (There is some debate about whether outlawing slavery was actually a big deal to the Trekkers, as they tended to be the poorer folks who would have been less likely to own slaves in the first place, but I don’t know anywhere near enough history here to weigh in on the debate.)
The Dutch population by this point also included a lot of Germans, French, etc., and so would be more accurately called Afrikaners. These Trekkers, or Voortrekkers, or Boers, or Trekboers, or Afrikaners, whatever we want to call them.
These Afrikaners are an interesting people, who endured considerable hardship to go live in the middle of nowhere with nothing but what they could carry in small wagons, their family, faith, and a few guns. They trekked toward the north east, until they ran smack into the southern end of the Great Bantu Migration. The Bantus (Zulus) massacred about 500 Boers–men, women, and children–in the middle of the night. Shortly after, approximately 30,000 Zulu soldiers attacked 460 Boers, at the Battle of Blood River. This time the Boers were awake, and since they had guns and the Zulus had pointy sticks, 3,000 Zulus died and 3 Boers were injured. (December, 1836.)
In 1866, diamonds were discovered on the banks of the Orange River. The diamond-rich territory was eventually awarded to Griqualand, which was subsequently annexed by Britain in 1874. In 1886, gold was found in Transvaal. The British had tried to conquer Transvaal in 1877, but did not succeed until the Second Anglo-Boer War, 1899-1902, which ended with the annexation of both Transvaal and the Orange Free State.
Lots of people were killed, but eventually the British got the upper hand and, having decided they were sick of the Boers, herded them into concentration camps and tried to kill them all:
“This was not the first appearance of internment camps. … But the Boer War concentration camp system was the first time that a whole nation had been systematically targeted, and the first in which some whole regions had been depopulated.
“Eventually, there were a total of 45 tented camps built for Boer internees and 64 for black Africans. Of the 28,000 Boer men captured as prisoners of war, 25,630 were sent overseas. The vast majority of Boers remaining in the local camps were women and children. Over 26,000 women and children were to perish in these concentration camps.
“… 93,940 Boers and 24,457 black Africans were reported to be in “camps of refuge” and the crisis was becoming a catastrophe as the death rates appeared very high, especially among the children.
“A report after the war concluded that 27,927 Boers (of whom 24,074 [50 percent of the Boer child population] were children under 16) had died of starvation, disease and exposure in the concentration camps. In all, about one in four (25 percent) of the Boer inmates, mostly children, died.
“Improvements [however] were much slower in coming to the black camps.” It is thought that about 12 percent of black African inmates died (about 14,154) but the precise number of deaths of black Africans in concentration camps is unknown as little attempt was made to keep any records of the 107,000 black Africans who were interned.” —Wikipedia
“[Hobhouse] describes Lizzie as “a frail, weak little child in desperate need of good care”, who was placed on the lowest rations and, after a month, was moved to the new hospital about 50 kilometres (31 miles) away from the concentration camp, suffering from starvation.
According to Hobhouse, she was treated harshly in the hospital. Unable to speak English, she was labelled an “idiot” by an English-speaking doctor and her nurses, who were unable to understand her. One day she started calling for her mother; a lady went over to comfort her, but “was brusquely interrupted by one of the nurses who told her not to interfere with the child as she was a nuisance.” Lizzie died in 1901 at 7 years of age.”
As a mother, I look at Lizzie and feel like someone has torn my heart out and stomped on it.
To add insult to murder,
“The photo [of Lizzie] was used as propaganda, author Hélène Opperman Lewis states, to convince the British public that Boer children were neglected by their parents. The image was released with the detail that it was taken when van Zyl and her mother entered the camp. Chamberlain was quoted in The Times on 5 March 1902, saying that Lizzy’s mother was prosecuted for mistreatment.
Hobhouse investigated the case and was unable to find any evidence of the case or prosecution of Lizzie’s mother. She located the photographer, a man named Mr. de Klerk, who confirmed that the photograph was taken two months after Lizzie arrived at the camp.”
And people accuse the Afrikaners of being racist.
I count about 62,000 people dead in this war. Certainly it was no WWII, but then, South Africa didn’t have that many people to start with, so percentage wise, it’s pretty significant.
Now, I want to pause and look at some demographic issues that contributed to the Anglo-Boer War. Note that the Boers had been pretty much going along, minding their own business, running their own country, for several decades before this war started. They’d gone through quite a bit of effort to get away from the British, successfully defeated the Zulus (and other tribes,) and weren’t even the worst people in the area.
“But wait,” I hear you saying, “Didn’t the Boers have slaves? Or at least Apartheid?”
I actually don’t remember if they had slaves; if they did, they are still better than the Congolese, who are not only enslaving the Pygmies right now, but also literally eat other humans. As for apartheid, do you think the Zulus were letting their conquered subjects vote? (Or live?)
For the most part, the Boers just wanted to be left the fuck alone–they didn’t conquer the Griquas, they abandoned their colony after the British took it over rather than fight for it, and I don’t think they were even messing with Natal. They just had the bad luck to have gold and diamonds, and the British decided they wanted gold and diamonds.
“In 1866 Erasmus Jacobs discovered diamonds at Kimberley, prompting a diamond rush and a massive influx of foreigners to the borders of the Orange Free State. Then in 1886, an Australian discovered gold in the Witwatersrand area of the South African Republic. Gold made the Transvaal the richest and potentially the most powerful nation in southern Africa; however, the country had neither the manpower nor the industrial base to develop the resource on its own. As a result, the Transvaal reluctantly acquiesced to the immigration of uitlanders (foreigners), mainly from Britain, who came to the Boer region in search of fortune and employment. This resulted in the number of uitlanders in the Transvaal potentially exceeding the number of Boers, and precipitated confrontations between the earlier-arrived Boer settlers and the newer, non-Boer arrivals.” —Wikipedia [Bold mine]
The British then demanded voting rights for their citizens in Transvaal, the Boers realized that they were outnumbered and that letting the Brits vote would result in their country becoming part of the British Empire and so refused, and so the war began.
Once you are a demographic minority, there is absolutely nothing to stop the majority from herding you into concentration camps and murdering you and your children, except for how much they pity you.
And nobody pities you, my friend.
At any rate, South Africa was thus forged from the Cape Colony, Natal, the Orange Free State, and Transvaal. (I still don’t know why Lesotho is independent. Perhaps no diamonds, or maybe just the fact that it’s on top of some mountains.) The British instituted the system of apartheid, perhaps because they felt like it, perhaps because they felt like making some concessions to the conquered Afrikaners.
SA became an independent country again in 1960. In 1966, UN resolution 2202 A (XXI) declared apartheid “A Crime Against Humanity.” (Of course, the UN also criticized the Vietnamese for kicking the Khmer Rouge out of Cambodia and decided to let the deposed Khmer Rouge gov’t continue holding its seat in the UN despite being one of the most genocidal regimes the earth has ever seen, so who gives a shit what the UN thinks?)
Deaths under apartheid:
“By mid-1987 the Human Rights Commission knew of at least 140 political assassinations in the country, while about 200 people died at the hands of South African agents in neighbouring states. The exact numbers of all the victims may never be known. …
3,100+ murders attributed to the SA government, and 5,800 murders attributed to the anti-apartheid fighters.
The ANC (African National Congress,) Nelson Mandela’s party, is a communist organization that received direct funding and training by the Soviet Union. (I strongly suspect that the vast majority of anti-colonialist movements were funded by the Soviets, as colonialism has strong capitalist ties, eg, the Dutch East India Company, and so Communism morphed into an anti-colonialist ideology by the 50s or 60s.)
The ANC engaged in a brutal execution method called necklacing:
“In 1986 Winnie Mandela, then-wife of the imprisoned Nelson Mandela, stated “With our boxes of matches and our necklaces we shall liberate this country. …
The first victim of necklacing, according to the South African Truth and Reconciliation Commission, was a young girl, Maki Skosana, on 20 July1985.
Moloko said her sister was burned to death with a tire around her neck while attending the funeral of one of the youths. Her body had been scorched by fire and some broken pieces of glass had been inserted into her vagina, Moloko told the committee. Moloko added that a big rock had been thrown on her face after she had been killed.” —wikipedia
As you know, nothing makes your country productive like electing communists who make their points by shoving broken glass into little girls’ vaginas.
Inkatha seems a little more into tribal pride and less communist; they’ve recently lost a bunch of parliamentary seats to the explicitly communist Economic Freedom Fighters. The EFF’s leader, Julius Malema, is a lovely person who admires Mugabe, advocates Mugabe-style seizure of mines and other economic resources in SA, and likes to lead the SA parliament in rousing choruses of “Shoot the Boer,” an old anti-apartheid war song.
SA president Jacob Zuma, a guy who gets 1.2 million pounds per year to support his four wives, is also fond “Shoot the Boer”:
“We are going to shoot them with machine guns, they are going to run… The cabinet will shoot them, with the machine gun… Shoot the Boer, we are going to hit them, they are going to run.”
“Cape Town – Social media buzzed on Monday over a picture of a banner allegedly shown at the Economic Freedom Fighter (EFF) launch in Marikana.
A picture showing a red banner with the words “A revolutionary must become a cold killing machine motivated by pure hate” was quickly shared on various social networks on Monday.
Another picture shows a banner saying “Honeymoon is over for white people in South Africa”.
“I also saw ‘we need to kill them like they killed us’ banners yesterday,” User Qaanitah Hunter said in a Tweet.”
From the second PDF:
“Over 3,000 white farmers have been murdered since the end of apartheid, according to Genocide Watch. Twenty years ago, there were 60,000 farmers. Today there are 30,000.
On August 8, two men were convicted of killing a 77-year-old man and his wife on their farm in Somerset. The husband was hacked to pieces. The wife was tied up, thrown in a freezer, and buried in frozen meat. She suffocated to death.
According to the police, the motivation was robbery.
On August 11, four men broke into 57-year-old Vivien Ponté’s home. She was tied to her bed, raped and lit on fire. Her house was ransacked, but it is unclear if anything was stolen.
Just another robbery gone bad.
On August 15, an 83-year-old Volksrust woman was assaulted, raped and left for dead, lying naked on the floor.
The list of “robberies” goes on. …
Beginning in 2003, the government began disbanding the rural commando units used to protect the remote farming communities that did not have police protection. The government said the commandos were unconstitutional and promised special police units to replace them. In 2008, the last commando unit was disbanded.
To this day, the special police forces still haven’t arrived.
Then in 2010, the government passed gun-control laws mandating that all guns be re-registered. In the process of registration, more than half the applicants were turned down and their weapons were seized.”
Various sources estimate the murder rate of SA farmers at about 100 per 100,000.
But you know, the Afrikaners are the racists.
Oh, let me include a bit from the Wikipedia page on Malema:
“Malema visited Zimbabwe in October 2012… “He said the youths in South Africa were calling for whites to surrender land and minerals resources they hold because when they came from Europe they did not carry any land into South Africa.”
“‘What we are asking is for them to surrender our minerals because they did not come with any minerals. We want that land and those minerals for free because they never paid for those minerals.’
“Malema told the youth he was in Zimbabwe to gain inspiration and wisdom, so that when he returned home he could “double the spirit of fighting against imperialist forces”.He called on black South Africans to have as many children as possible so as to increase dominance of ‘our ideas’ in the world at large and help catalyze world revolution.
“‘We want to see many kids, why? Because we must reproduce ourselves. For our ideas to be sustainable, we have to reproduce ourselves. In the whole of Africa, we are not more than one billion and the world has seven billion people. In Africa we have not more than one billion people… facing more than six billion. We have to be half of that so that our ideas can dominate. I know that in some instances size does not matter… but when it comes to a revolution, size matters.‘” (bold mine)
Malema is descended from Bantus, so he is no more entitled to the mines than anyone else is, and certainly no one was mining those minerals before the Boers and English got there. If they were precious to Malema’s people, they would have been mining them, but they weren’t.