In Kids These Days: Human Capital and the Making of Millennials, Malcolm Harris lays out the myriad ways in which our generation has been trained, tailored, primed, and optimized for the workplace — first in school, then through secondary education — starting as very young children. “Risk management used to be a business practice,” Harris writes, “now it’s our dominant child-rearing strategy.” …
Harris points to practices that we now see as standard as a means of “optimizing” children’s play, an attitude often described as “intensive parenting.” Running around the neighborhood has become supervised playdates. Unstructured day care has become pre-preschool. Neighborhood Kick the Can or pickup games have transformed into highly regulated organized league play that spans the year. Unchanneled energy (diagnosed as hyperactivity) became medicated and disciplined.
Like most old millennials, my own career path was marked by two financial catastrophes. In the early 2000s, when many of us were either first entering college or the workforce, the dot-com bubble burst. … skilled jobs were in short supply. I worked as a nanny, a housemate worked as an assistant, a friend resorted to selling what would later be known as subprime mortgages.
Those two years as a nanny were hard — I was stultifyingly bored and commuted an hour in each direction — but it was the last time I remember not feeling burned out. I had a cellphone, but couldn’t even send texts … I was intellectually unstimulated, but I was good at my job — caring for two infants — and had clear demarcations between when I was on and off the clock.
Then those two years ended and the bulk of my friend group began the exodus to grad school. … It wasn’t because we were hungry for more knowledge. It was because we were hungry for secure, middle-class jobs — and had been told, correctly or not, that those jobs were available only through grad school. Once we were in grad school, and the microgeneration behind us was emerging from college into the workplace, the 2008 financial crisis hit. …
More experienced workers and the newly laid-off filled applicant pools for lower- and entry-level jobs once largely reserved for recent graduates. We couldn’t find jobs, or could only find part-time jobs, jobs without benefits, or jobs that were actually multiple side hustles cobbled together into one job.
These are the good points, and all of us can recognize how, regardless of our personal trajectory, that dealing with two recessions in a row when you are trying to enter the workforce can be a major problem. This is stuff that no one except maybe the President or the Fed Chairman can do much about, and it’s good to recognize that some of us had an easier start in life than others.
After some more very reasonable points, article makes an unfortunate turn, discussing the tyranny of things people definitely do have control over:
… They’d never seen the particular work that they do described, let alone acknowledged. And for millennials, that domestic work is now supposed to check a never-ending number of aspirational boxes: Outings should be “experiences,” food should be healthy and homemade and fun, bodies should be sculpted, wrinkles should be minimized, clothes should be cute and fashionable, sleep should be regulated, relationships should be healthy, the news should be read and processed, kids should be given personal attention and thriving. Millennial parenting is, as a recent New York Times article put it, relentless.
Stop. Just stop.
Most of this is unnecessary bullshit being sold to you by ads in women’s magazines.
Stop doing “outings.” Eat what you need to get by and you won’t need to exercise. Sleep when you’re tired. Shop less. Don’t read the news.
“I’m really struggling to find the Christmas magic this year,” one woman in a Facebook group focused on self-care recently wrote. “I have two little kids (2 and 6 months) and, while we had fun reading Christmas books, singing songs, walking around the neighborhood to look at lights, I mostly feel like it’s just one to-do list superimposed over my already overwhelming to-do list. I feel so burned out. Commiseration or advice?”
You know what? I don’t like holidays. I’m perfectly happy taking advantage of whatever fun activities are available for my kids, but I’m not adding to an already overwhelming to-do list. Holidays are supposed to make you feel better, not worse. If what you’re doing isn’t helping, then STOP.
While writing this piece, I was orchestrating a move, planning travel, picking up prescriptions, walking my dog, trying to exercise, making dinner, attempting to participate in work conversations on Slack, posting photos to social media, and reading the news. I was waking up at 6 a.m. to write, packing boxes over lunch, moving piles of wood at dinner, falling into bed at 9.
I assume the job, move, and prescriptions are required. Owning a dog, exercising, travel, posting photos on social media, reading the news, and making dinner in the midst of a move are not. For goodness’ sakes, order a pizza. If posting on Instagram is stressing you out, stop posting on Instagram.
Even the trends millennials have popularized — like athleisure — speak to our self-optimization. Yoga pants might look sloppy to your mom, but they’re efficient: You can transition seamlessly from an exercise class to a Skype meeting to child pickup.
Let me tell you something about poor people: they don’t take exercise classes. They certainly don’t buy special pants for their exercise classes and then complain that their mom calls them sloppy.
Poor people don’t have the money for fucking exercise classes.
So there are two separate things going on in this article. The first is a very reasonable thing about recessions, temp work, work that bleeds into free time, never ending to-do lists, etc. And really, this is something that I think needs to be said louder and more often: many people worked hard, their parents worked hard, they did “everything right” and still got screwed by a system that is simply bigger than themselves.
The second is a very stupid thing about how hard it is to change pants between Yoga class and picking your kids up from daycare.
Look, I know you want to do everything, but you can’t. I know there are popular magazines out there claiming that you should spend two months salary on a diamond ring, but this is a complete fiction made up to benefit the diamond companies. Your parents never did extra curriculars–either they went to school clubs, church, or they rode their bikes around the neighborhood. These things are nice if you can afford them and have the time for them, but they are not necessary.
Take back your time. Learn to say no. YOU DON’T HAVE TO DO EVERYTHING.
Steven Pinker’s The Blank Slate was one of my top reads of 2018. Simultaneously impassioned, philosophic, and rational, Pinker covers everything from art to parenting, morality to language. What makes us us? Where does human nature–and individual personality–come from? And what are the moral implications if blank slateist views of human nature are false?
Yes, Pinker writes from a liberal perspective, for a liberal audience–Pinker hails from a liberal culture and addresses the members of his own culture, just as a French writer addresses a French audience. But this is about as far as conventions like “left” and “right” can take you in this book, for it is clear that Pinker thinks breaking down political ideology and morality based on the seating patterns of an eighteenth-century French legislature is not terribly meaningful.
Is the blank slate–the idea that humans are born essentially similar in personality, temperament, abilities, and potential, and that environmental plays a substantial role in determining whether we turn out to be Nobel Prize winners or drag queens, Jeff Bezos or homeless, criminals or lion tamers–moral?
Its adherents claim that it is–indeed, some react to any suggestion that humans have any innate or biological nature with a vehemence normally reserved for rapists and murderers.
Pinker responds that the denial of human nature causes unimaginable suffering. Humans cannot cast aside their natures simply because an ideology (or religion) tells them to. To attempt to remake man is to destroy him.
Further, it is blatantly untrue, and the promotion of obvious lies in pursuit of ideological outcomes is bound to backfire–turning people away from the academics and fields that promote such lies. (Pinker may be overly optimistic on this point.)
Chapter 1 is a bit slow if you are already familiar with the history of psychology and the blank slate in philosophy, but after that it picks up nicely.
There is an unstated conclusion we may draw here that psychology as a discipline has been hampered by the kinds of people who go into the psychology. Perhaps this is my own theory I am imposing onto Pinker’s work, but it seems like people with a good, intuitive grasp of how people work don’t go into psychology–they go into sales. The folks in psychology (and psychiatry, perhaps) seem drawn to the field because they find people mysterious and fascinating and want to understand them better.
But without an intuitive understanding of how people work, there are often big areas they miss.
Since I listened to this in audio book format, quoting is tricky, but I have tried to transcribe this bit:
Until recently, psychology ignored the content of beliefs and emotions, and the possibility that the mind had evolved to treat biologically important categories in different ways. … Theories about memory and reasoning didn’t distinguish between thoughts about people and thoughts about rocks or houses. Theories of emotion didn’t distinguish fear from anger, jealousy, or love. Theories of social relation didn’t distinguish between family, friends, enemies, and strangers.
Indeed, the topics in psychology that most interest lay people–love, hate, work, play, food, sex, status, dominance, jealousy, friendship, religion, art–are almost completely absent from psychology textbooks.
It’s hard to see what you can’t see.
The field was also historically rather short on women, especially women with normal lives. Many of these blank slateist quotes from psychologists and philosophers about human nature and instincts seem like the kinds of ideas that raising a few children would quickly disabuse you of.
Next he discusses Durkheim’s observation that people behave differently in groups than they do singly or would behave had they not been part of a group. From this I think Durkheim derives his idea that “human nature” and “human behavior” are not innate or instinctive, but culturally induced.
Some years ago, I realized there is probably an important key to human behavior that is rarely explicitly discussed because if you have it, it is so obvious that you don’t even notice it, and if you don’t have it, it’s so non-obvious that you can’t figure it out: an imitation instinct.
People desire to be like the people around them, and for probably evolutionarily sound reasons.
If everyone else in your tribe says, “Don’t drink that water, it’s bad,” you’re better off avoiding the water than taking your chances by doing an independent test on the water. If your tribe has a longstanding tradition of “don’t eat the red berries, no I don’t know why, grandpa just told me to never ever eat them,” it’s probably best to go along. As Chesterton says, don’t tear down a fence if you don’t know why it’s there.
I think a compulsion to fit in, imitate, and go along with others is very deep. It’s probbly not something people are explicitly aware of most of the time. This results in people using arguments like “That’s weird,” to mean, “That’s bad,” without explaining why “weird” is bad. They just intuitively know, and expect that you understand and agree with the speaker’s intuition that weird and different are inherently bad things.
This leads to 1. self-policing–people feel very out of place when they aren’t going along with the group and this can make them deeply unhappy; and 2. other-policing–people feel unhappy just looking at someone else who is out of place, and this makes them respond with anger, hostility, and sometimes even violence toward the other person. (Even when what that other person is doing is really quite inconsequential and harmless.)
Anyway, I think Durkheim has missed that step–that connection between group activity and individual activity.
Obviously people are shaped by their groups, since most hunter-gatherer babies grow up to be hunter-gatherers and most people in our society grow up and figure out how to use cell phones and computers and cars. But I think he has missed the importance of–and critically, the usefulness of–the underlying mental trait that lets us learn from our cultures.
So people don’t behave differently in groups than when they’re alone because they lack some inherent human nature, but because part of our nature compels us to act in concordance with our group. (Most of us, anyway.)
(This is about where I stopped taking notes, so I’m working from memory.)
Pinker then discusses the neurology of learning–how do we learn language? How does the brain know that language is something we are supposed to learn? How do we figure out that the family pet is not named “No no bad dog, get off the sofa”?
There are some interesting experiments done on mice and kittens where experimenters have done things like reverse the parts of the brain auditory or visual inputs go to, or raise the kittens in environments without vertical lines and then introduce them to vertical lines, etc. The brain shows a remarkable plasticity under very strange conditions–but as Pinker points out, these aren’t conditions humans normally encounter.
Sure, you can teach people to be afraid of flowers or like snakes, but it is much, much easier to teach people to like flowers and be afraid of snakes.
Pinker points to the ease with which we learn to fear some objects but not others; the ease with which we learn to talk (except for those of us with certain neurological disorders, like brain damage or autism) verses the difficulty we have learning other things, like calculus; the rapidity with which some behaviors emerge in infancy or childhood (like aggression) verses the time it takes to instill other behaviors (like sharing) in children.
In short, we appear to come into this world equipped to learn certain things, to respond to certain stimuli, and behave in particular ways. Without this basic wiring, we would not have any instinct for imitation–and thus babies would not coo in response to their mothers, would not start babbling in imitation of the adults around them, and would not learn to talk. We would not stand up and begin to walk–and it would be just as easy to train people to enjoy being victims of violence as to train people not to commit violence.
Throughout the book, Pinker discusses the response of the more extreme left–people whom we today call SJWs or antifa–to the work and theories put out by academics who are undoubtedly also culturally liberal, like Napoleon Chagnon, the famous anthropologist who studied the Yanomamo tribesmen in the Amazon. For his meticulous work documenting Yanomamo family trees and showing that the Yanomamo men who killed more people wound up wound up with more children than the men who killed fewer people, he was accused by his fellow academics of all sorts of outlandish crimes.
In one absurd case, he was accused of intentionally infecting the Yanomamo with measles in order to test a theory that Yanomamo men had more “dominant genes,” which would give them a survival advantage over the measles. This is a serious accusation because exposure to Western diseases tends to kill off the majority of people in isolated, indigenous tribes, and absurd because “dominant genes” don’t confer any more or less immunity to disease. The accuser in this case has completely misunderstood the meaning of a term over in genetics. (It is rather like someone thinking the word “straight” implies that heterosexuals are supposed to have straighter bones than homosexuals, and then accusing scientists of going around measuring people’s bones to determine if they are gay or not.)
The term “dominant” does not mean that a gene gives a person any form of “dominance” in the real world. It just means that in a pair of genes, a “dominant” one gets expressed. The classic example is blue verses brown eyes. If you have one gene for blue eyes from one parent, and one for brown eyes from your other parent, anyone looking at you will just see brown eyes because only that gene gets used. However, you might still pass on that blue eye gene to your children, and if they receive another blue gene from your spouse, they could have blue eyes. Since blue eyes only show up if both of a person’s eye color genes are blue, we call blue eyes “recessive.”
But having a “dominant” gene for eye color doesn’t make someone any more “dominant” in real life. It doesn’t make you better at beating people up or surviving the flu–and nothing about the Yanomamo lifestyle suggests that they would have more “dominant genes” than anyone else in the world.
Side note: this strange misconception of how genes work made it into Metal Gear Solid:
“I got all of the recessive genes! You took everything from me before I was even born!”
The fact that the far left often engages in outright lies to justify real violence against the people they dislike–people who aren’t even conservatives on the American scale–makes one wonder why Pinker identifies at all with the left’s goals, but I suppose one can’t help being a part of one’s own culture. If a Frenchman objects to something happening in France, that doesn’t turn him into a German; a Christian doesn’t stop believing in Jesus just because he objects to Fred Phelps.
The book came out in 2002, before “antifa” became a household term. I think Pinker expected the evils of communism to become more widely known–not less.
There is an interesting discussion of E. O. Wilson’s Sociobiology and how a better understanding of human family dynamics (especially whether they become controlling and harmful) could improve women’s lives, not harm them. (Wilson’s work I would like to explore in more depth.)
Pinker proceeds to a moving chapter parenting (I teared up at the end, though that might have just been the effects of several days of inadequate sleep.) How much effect do parents have on how their children turn out? At least within the normal range of parenting, not much–kids seem to turn out as they will, despite our best efforts. Sure, there’s plenty of evidence that you can damage kids by shaking them, dropping them on their heads, or locking them in the closet for years–but this is not normal parenting. Meanwhile, there’s very little evidence in favor of any interventions that can raise a child’s IQ (or any other trait) above what it would have been otherwise. It’s much easier to break a complicated system than enhance it.
People often respond along the lines of “If I cannot shape my children like clay, determining how they turn out as adults, what’s the point of parenting at all?”
It’s a terrible response, as Pinker points out. Children are human and deserve to be valued for the people they are (and will be,) not because you can change them. You are not kind to your spouse because you expect to change them, after all, but because you like them and value them. Likewise, be kind to your children because you love and value them, not because you can program them like tiny computers.
In search of the reasons people turn out the way they do, Pinker (and other writers) turns to the random effects of “the environment”–things like “the friends you had in highschool.” Certainly environment explains a good deal, like what language you speak or what job options exist in your society, but I think he neglects an alternative possibility for some traits: random chance. There are aspects of us that are just “who we are” and aren’t obviously determined by anything external. One child loves dogs, another horses. One person enjoys swimming, another biking, a third Candy Crush.
Here a religious person might posit a “soul” or some other inner essence.
The difficulty with the theory that children take after their peers–they do what it takes to fit in with their friends–is it neglects the question of why a child becomes friends with a particular group of other children in the first place. I don’t know about you, but my friends aren’t chosen randomly from the people around me, but tend to be people I have something in common with or enjoy being around in the first place.
At any rate, it is certainly possible for well-meaning parents to isolate a child from peers and friends in an attempt to alter personalty traits that are actually innate, or at least not caused by those other children.
The meat of the book wraps up with a discussion of “modern art” and why it is terrible.
Overall, it was an excellent book that remains fresh despite its age.
Last weekend, (as of when I wrote this,) while the rest of the world landed rockets on the moon, launched revolutions, enjoyed a good soccer match, or whatever it is other people do, Americans lost their shit over a teenager smirking (SMIRKING, I tell you) at a Native American.
This smirking teenager was so shocking to the American conscience that no less a newspaper than the New York Times covered the incident:
They intersected on Friday in an unsettling encounter outside the Lincoln Memorial — a throng of cheering and jeering high school boys, predominantly white and wearing “Make America Great Again” gear, surrounding a Native American elder.
Of course, many pundits have argued that wearing a hat supporting the sitting US president is itself a crime.
Condemnation for the crime of “getting up in yo face and smirking while wearing a hat” was swift. A Disney producer called for the boy to fed, head first, into a woodchipper.
Calmer voices advocated for merely punching the boy in the face.
About five minutes later, more video footage of the event emerged, and the real story began trickling through the internet–contrary to what the NY Times had reported, the smirking teens had not surrounded a Native American elder. The elder, (Nathan Philips,) had walked up to them, and they, waiting for their bus at the end of a school field trip, had stayed put and kept waiting for their bus.
At this point, some in the media apologized–and others doubled down. Smirking was a crime. The students were racists.
Everyone who bullied this little boy absolutely deserves to be beaten and then their parents deserve to be beaten for raising such disgusting little shits, but no one is calling for them to be put into a woodchipper, because the good and thoughtful of America don’t think bullying a disabled child to death is as terrible a crime as smirking at a guy.
I have yet to observe anyone in the media suggesting that we could save the American taxpayers a bundle by feeding Cerda through a woodchipper instead of keeping him in prison. Does he have a punchable face? More like a face that would break your fist if you tried.
I could go on. Criminals do terrible things every day. People raped, tortured, and murdered, even children. True, we have a system in place that tries, (albeit clumsily and at times with sociopathic carelessness,) to punish criminals and remove them from the rest of us, but the high and mighty of our nation seem utterly unmoved by their crimes. They express only confusion–and anger–at the peasant rabble that gets worked up by such meaningless events as “someone murdering your daughter.” Don’t these peasants know that the real crimes are committed by smirking schoolboys? That the real crime is smirking?
The real divide in America today is between people who think it should be illegal to shoot home invaders but legal to put MAGA teens through woodchippers, and everyone else who hasn’t gone completely fucking insane.
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.)
The Wikipedia page about Hamatsa is very interesting.
The Kwakwaka’wakw are an indigenous group from the Pacific North West Coast (ie, British Columbia.) During the long, dark, wet winters, tribe members traditionally entertained themselves via ceremonies put on by different “secret societies.” These were documented back in the 1880s by Franz Boas, the famous anthropologist. (Modern Kwakwaka’wakw society is probably pretty different, given that life has changed a lot in the intervening 140 or so years.)
According to Wikipedia’s version of Boas’s account, there were four main societies: The war society (Winalagalis), the magical society (Matem), the society of the afterlife (Bakwas) and the “cannibal” society (Hamatsa).
Hamatsa was the most prestigious. Whether or not they practiced literal cannibalism or something that just sounds like cannibalism remains a matter of debate, because their rituals were pretty secret.
In defense of the “it’s just a symbolic ritual” argument, the transubstantiation of the Eucharist into the body and blood of Christ, followed by the congregation eating it, sounds a lot like cannibalism and has surely confused some folks over the centuries, but no serious Christian literally believes they are committing cannibalism.
In defense of the “it’s totally real cannibalism” argument, real cannibalism is a thing that sometimes happens and that some anthropologists have been quick to cover up or downplay because they don’t want to say anything bad about other peoples.
Here is Wikipedia’s account of the Hamatsa initiation rite:
In practice the Hamatsa initiate, almost always a young man at approximately age 25, is abducted by members of the Hamatsa society and kept in the forest in a secret location where he is instructed in the mysteries of the society. Then at a winter dance festival to which many clans and neighboring tribes are invited the spirit of the man-eating giant [Baxbaxwalanuksiwe] is evoked and the initiate is brought in wearing spruce bows and gnashing his teeth and even biting members of the audience. Many dances ensue, as the tale of Baxbaxwalanuksiwe is recounted, and all of the giant man-eating birds dance around the fire.
Finally the society members succeed in taming the new “cannibal” initiate. In the process of the ceremonies what seems to be human flesh is eaten by the initiates. Boas describes the hamatsa initiate as eating actual human flesh without chewing. After the ceremony, the initiate is forced to drink large amounts of sea water to induce vomiting, thereby voiding the body of potentially harmful toxins. All persons who were bitten during the proceedings are given expensive presents, and many gifts are given to all of the witnesses who are required to recall through their gifts the honors bestowed on the new initiate and recognize his station within the spiritual community of the clan and tribe.
Based on this account, if I may be so bold as to suggest anything after reading just a few paragraphs on Wikipedia, the ceremony sounds not pro-cannibalism, but anti-cannibalism. Cannibalism is the wild state from which the initiate is removed; he eats human flesh (or symbolic flesh) but is then made to vomit it up; he bites people, but then he apologizes. He goes from feral man-eater to civilized member of the society.
The picture at the top of the post was taken by Edward S. Curtis, an amazingly talented photographer who documented Native Americans and life generally in the American West in the late 18 and early 1900s.
In the Land of the Head Hunters has often been discussed as a flawed documentary film. The film combines many accurate representations of aspects of Kwakwaka’wakw culture, art, and technology from the era in which it was made with a melodramatic plot based on practices that either dated from long before the first contact of the Kwakwaka’wakw with people of European descent or were entirely fictional. …
Some aspects of the film do have documentary accuracy: the artwork, the ceremonial dances, the clothing, the architecture of the buildings, and the construction of the dugout, or a war canoe reflected Kwakwaka’wakw culture. Other aspects of the film were based on the Kwakwaka’wakw’s orally transmitted traditions or on aspects of other neighboring cultures. The film also accurately portrays Kwakwaka’wakw rituals that were, at the time, prohibited by Canada’s potlatch prohibition, enacted in 1884 and not rescinded until 1951.
The potlatch was (is) a related ritual involving feasting and gift-giving; a great deal has been written about potlatches–the Wikipedia page probably isn’t a bad place to start if you are unfamiliar with them.
The Canadian government saw them as wasteful because they apparently also involved the destruction of large amounts of property, and so outlawed them. This was an unproductive and stupid law, as Boas pointed out:
The second reason for the discontent among the Indians is a law that was passed, some time ago, forbidding the celebrations of festivals. The so-called potlatch of all these tribes hinders the single families from accumulating wealth. It is the great desire of every chief and even of every man to collect a large amount of property, and then to give a great potlatch, a feast in which all is distributed among his friends, and, if possible, among the neighboring tribes. These feasts are so closely connected with the religious ideas of the natives, and regulate their mode of life to such an extent, that the Christian tribes near Victoria have not given them up. Every present received at a potlatch has to be returned at another potlatch, and a man who would not give his feast in due time would be considered as not paying his debts. Therefore the law is not a good one, and can not be enforced without causing general discontent. Besides, the Government is unable to enforce it. The settlements are so numerous, and the Indian agencies so large, that there is nobody to prevent the Indians doing whatsoever they like.
On the other hand, the destruction of property at potlatches sometimes included the destruction of slaves, at least among the Tlingit. I don’t know if this happened in every society that held potlatches, but killing slaves is a practice the government certainly had an interest in stopping.
You ask if those [Tlingit] women were put to death? Forget now which of the many slaves you mean. But of course not. Thank God not one has been sacrificed since Hampus is Governor; he has purchased them free on the C[ompany] account, & one slave woman we purchased by a general subscription for 700 R[oubles] B[anco] or 200 R[oubles] S[ilver] — A few months ago the Indians hada great festival. You must know that the conclusion of building new houses, or Barabors as they call them, is a great fete with them, to which they invite all their neighbors at a great distance… Before parting they give away everything they possess, not only all their provisions, but blankets, in one word everything, so that they are quite, quite poor now. At the end of such a fete it is their custom to sacrifice slaves, but before these strangers arrived, Hampus called 7 or 8 of our Teone or chiefs, & forbade them to kill anyone. He promised to give them now & then some present, & to invite them each year to dinner, besides which positively told them, that the moment they attempted to kill one of their slaves, he would fire upon them & their village. The consequence of this was, that they liberated 19 slaves & gave them as a present to the Company. I went with Hampus to see some of them, & expected to see their faces radiant with joy over their liberty. But you could not have guessed they had been doomed to die. To me it was something wonderful as I gazed at them; one was a pretty little girl of 9 – 11 years old…
A little more googling suggests that the Kwakwaka’wakw did it, too, eg:
The Kwakiutl [Kwakwaka’wakw] Winter Ceremonial changed when blankets replaced animal skins and human sacrifice. This resulted in the emergence of a secular potlatch sometime after 1862…
From Human Trophy Hunting on the Northwest Coast, an article by Joan Lovisek, in The Taking and Displaying of Human Body Parts as Trophies by Amerindians. It appears that with the arrival of interesting trade goods from whites, the locals had less reason to sacrifice slaves, and so switched (plus they were officially forbidden to do so.) Coppers–large pieces of copper obtained via trade and beaten into a rectangular shape–were sacrificed instead. Luckily for the coppers, they could be repaired and re-sacrificed, and became a kind of currency.
Of course, destroying goods was never as important as giving them away.
Note: this is just a theory, developed in reaction to recent conversations.
From Twitter user FinchesofDarwin comes an interesting tale, about a polygynously-married woman in Guiana:
Manwaiko had two wives, and each of these had a family of young children. … Between the two wives and their respective children little kindness seemed to exist. One evening, while the party were squatting on the ground, eating their supper… one of the wives, who with her children had been employed in cutting firewood, discovered, on her return, that the supper for herself and her family was not to be found, having been carried off by some animal through neglect or connivance of her rival. It could hardly be expected that she would sit down quietly without the evening meal for herself and her children… and she accordingly applied to Manwaiko for a share of his allowance, which was ample. He treated her request with contempt… She then commenced a furious torrent of abuse, during which he finished his meal with great composure, until, being irritated at his indifference, she at last told him that he was no “capitan,” no father, and no man. …
Such stormy ebullitions of temper are rare in the Indian families, though, where polygamy is practiced, continual variance and ill-feeling are found.
From The Indian Tribes of Guiana, their Condition and Habits, by Reverend Brett, 1868
As we were discussing Friday, one form of female sociopathy (at least relevant to this conversation) likely involves manipulating or coercing others into providing resources for her children. On Monday we discussed mental illness and its effects on fertility (generally it lowers fertility in men, but depression has little to no effect on women, neuroticism may enhance fertility, and sometimes the sisters of people with mental illnesses have slightly increased fertility, suggesting that low levels of certain traits may be beneficial.)
Here is where I get 100% speculative, and to be frank, I don’t like saying negative things about women (since I am one,) but if men can be sociopaths, then women can, too–and conversely, the majority of men are not sociopaths, and neither are the majority of women.
In the quoted passage, we see two common tropes: First, the evil stepmother, in the form of the wife who let wild animals make off with half of the family’s food. Second, the crazy bitch, who goes on a tirade questioning her husband’s manliness because he has failed to provide food for her children.
In this case, only the first woman is truly sociopathic (she has harmed the other woman and her children,) but we can see how the second’s behavior could easily spill over into unreasonable demands.
Female sociopathy–manipulating men out of their money–only works as an evolutionary strategy in an environment where men themselves vary in their trustworthiness and cannot be easily predicted. If the men in a society can be counted upon to always provide for their offspring, women have no need to try to manipulate them into doing so; if men in a society flat out refuse to do so, then there is no point to trying. Only in a situation where you can affect the amount of resources you get out of a man will there be any point to doing so.
Given the environmental constraints, sociopathic female behavior is likely to increase in reaction to an increase in sociopathic male behavior–that is, when women fear abandonment or an inability to care for their children.
This manipulation has two targets–first, the father of the child, whom the woman wishes to prevent from wandering off and having children with other women, or baring that, from giving them any resources. Second, should this fail, or the male be too violent for women and children to be near, the woman targets a new male to convince him to care for her, her children, and possibly beat the resources out of the old male.
Since children actually do need to eat, and getting enough resources can be tough, society is generally fine with women doing what they need to provide for their families (unlike men doing whatever they need to maximize reproduction, which usually ends with the police informing you that no, you cannot go “Genghis Khan” on Manhattan.)
But at times women really do go overboard, earning the title of “crazy ex.” Here’s part of one woman’s helpful list of why she went crazy:
1. He told me he loved me, then he left me. … I wasn’t going to make it easy for him to leave me. I promised myself I’d fight for my relationship because I loved him and he said he loved me. … 3. If you didn’t know, one of the quickest ways to drive a woman insane is to ignore her. … This was the most severe phase of crazy for me. I was infuriated that not only was I losing my relationship and wasn’t given a reason why, but I was being blatantly ignored by him too! … 4. He told me not to worry about his “friend,” and now he’s dating her.
Back before the invention of birth control, a woman who got dumped like this was most likely pregnant, if not already caring for several children. Abandonment was a big deal, and she had every reason not to just let her partner wander off and start impregnating new chicks.
In our modern world, he made it clear that he didn’t want to be in a relationship anymore and left.
After my ex boyfriend broke up with me I went crazy… After he dumped me for the third time I felt used and devastated. I wanted an explanation and answers. He was a jerk to me. A cruel son of a bitch. I kept begging, calling, and begging. I never got a reply back. This went on for over 3 months. …
This isn’t the only kind of “crazy” I’ve seen around, though.
An acquaintance recently recounted a story about an ex who actually ended up in the mental hospital for suicidal ideation. She listed him as her contact, something he was not exactly keen on, having already told her the relationship was over.
Then there is the phenomenon of people actually claiming to be crazy, often with rather serious disorders that you would not normally think they would want to revealing to others. For example, I have seen several young women claim recently to have Multiple Personality Disorder–a condition that is not in the DSM and so you can no longer get diagnosed with it. Though you can get diagnosed with Disassociative Identity Disorder, this disorder is rare and quite controversial, and I would expect anyone with a real diagnosis to use the real name, just as few schizophrenics claim to have been diagnosed with dementia praecox.
MPD is less of a real disorder and more of a fad spread by movies, TV, and unscrupulous shrinks, though many people who claim to have it are quite genuinely suffering.
(I should emphasize that in most of these cases, the person in question is genuinely suffering.)
Most of these cases–MPD, PTSD, etc–are supposedly triggered by traumatic experiences, such as childhood abuse or spousal abuse. (Oddly, being starved half to death in a POW camp doesn’t seem to trigger MPD.) And yet, despite the severity of these conditions, people I encounter seem to respond positively to these claims of mental illness–if anything, a claim of mental illness seems to get people more support.
So I suggest a potential mechanism:
First, everyone of course has a pre-set range of responses/behaviors they can reasonably call up, but these ranges vary from person to person. For example, I will run faster if my kids are in danger than if I’m late for an appointment, but you may be faster than me even when you’re just jogging.
Second, an unstable, violent, or neglectful environmental triggers neuroticism, which in turn triggers mental instability.
Third, mental instability attracts helpers, who try to “rescue” the woman from bad circumstances.
Fourth, sometimes this goes completely overboard into trying to destroy an ex, convincing a new partner to harm the ex, spreading untrue rumors about the ex, etc. Alternatively, it goes overboard in the woman become unable to cope with life and needing psychiatric treatment/medication.
Since unstable environments trigger mental instability in the first place, sociopathic men are probably most likely to encounter sociopathic women, which makes the descriptions of female sociopathy automatically sound very questionable:
“My crazy ex told all of our friends I gave her gonorrhea!”
“Yeah, but that was after you stole $5,000 from her and broke two of her ribs.”
This makes it difficult to collect objective information on the matter, and is why this post is very, very speculative.
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.
Note: this is just a theory, developed in reaction to recent conversations.
As we were discussing Friday, one form of female sociopathy (at least relevant to this conversation) likely involves manipulating or coercing others into providing resources for her children.
There are a couple of obvious tropes:
The evil stepmother, who shunts resources away from a man’s first child, toward his later children.
The cuckoldress, who tricks or convinces a man to care for another man’s children (this is not always seen as evil, since the male drive to provide for children is triggered at least partly by their proximity, since men cannot give birth, and thus men feel genuine affection for children who happen to be around them,)
The crazy ex, who sues a man for all he is worth, doing her best to prevent him from being able to provide for any future children.
How crazy are women?
22%–slightly more than 1 in 5–women have been diagnosed with a mental illness, at least according to all of the data I’ve seen. Since mental illness peaks during the childbearing ages and falls off quickly after menopause, we can also assume that this rate is closer to 1 in 4 during these years.
(The dramatic problems our Native American communities are facing is a separate matter, deserving of its own post.)
The odd thing about this data is that mental illness rates are higher for women than men, despite the fact that mental retardation and mental disability rates are higher for men than women. Men are more likely than women to have serious conditions like non-verbal autism and schizophrenia, more likely to be homeless or commit suicide. When things go terribly wrong, the sufferers are disproportionately male (an unfortunate side effect of the Y chromosome causing greater male variability than female variability on a variety of traits.)
So why on earth do more women than men suffer from mental illness?
Perhaps some forms of mental illness confer some unexpected benefits on women.
Many (perhaps most) “mental illnesses” correlate with a single personality trait–neuroticism:
“Previously we thought that mental illnesses such as depression, schizophrenia, bipolar disorder, and substance abuse, were completely separate diseases,” Ystrøm says.
But research has now shown that these illnesses are often linked. If you suffer from one mental illness, you are more likely to develop another. And if someone in your immediate family has a psychiatric illness, your risk increases not only for this disorder, but for all other disorders.
These findings have led researchers to suspect that there could be a common underlying factor that increases an idividual’s risk of mental illness, overall. …
Ystrøm and colleagues have used new statistical methods to look for patterns in personality, mental disorders, genes, and environmental factors, among the twins in the Twin Register.
And the answer to the question the researchers asked is: yes, neuroticism seems to be the personality trait that best describes the risk of all mental disorders. …
“This one trait doesn’t explain everything. Anyone can develop a mental illness…”
Taking an evolutionary approach, we use data from a contemporary polygynous high-fertility human population living in rural Senegal to investigate whether personality dimensions are associated with key life-history traits in humans, i.e., quantity and quality of offspring. We show that personality dimensions predict reproductive success differently in men and women in such societies and, in women, are associated with a trade-off between offspring quantity and quality. In women, neuroticism positively predicts the number of children, both between and within polygynous families. Furthermore, within the low social class, offspring quality (i.e., child nutritional status) decreases with a woman’s neuroticism, indicating a reproductive trade-off between offspring quantity and quality.
What is neuroticism, in the Big 5 Personality Traits* sense?
*Note: I am not endorsing or denying all five traits one way or another.
It’s worrying. Mothers who worry more about their offspring have more offspring–though it’s quite easy to imagine that the causality points in the opposite direction as the study’s authors conclude–poor women with lots of skinny babies have more reason to worry about their children than women with a few fat babies.
When are women most likely to experience mental illness?
Immediately after the birth of a child. It’s called post-partum depression, and it can be very bad–one woman in my moms’ group ended up in the mental hospital after developing post-partum psychosis. Andrea Yates famously drowned her five children during a bout of post-partum depression/psychosis.
Why on earth would women develop a debilitating mental illness at the most vulnerable time in their offspring’s life? Wouldn’t natural selection select rather quickly against anything that makes women worse at taking care of their offspring?
Let’s turn to everyone’s favorite genetic disease, sickle cell anemia. SCA is famous for being a relatively simple genetic mutation of the sort where if you have one copy of the sickle cell gene, you are less likely to get malaria, and if you have two copies, you tend to die. In areas where malaria is common, the cost of having a quarter of your children die from SCA is lower than the cost of loosing them to malaria.
Personality traits, including neuroticism, generally exist on a continuum. People may become more neurotic when life warrants it, and less neurotic when they don’t need to worry. A mother with a new baby is in a very vulnerable state–she has just lost a good deal of blood, may not be able to walk, and has an infant to care for every other hour, day and night. It is not a normal state by any measure. It is a time when being extra attentive and extra aware of threats and predators is in a woman’s interest.
It is also a time when women are most in need of help from their mates, relatives, or other friends. Increased neuroticism may also prompt others to attend more closely to the new mother, helping her out. . Increased neuroticism may be so helpful during this time period that a few women getting way too much neuroticism and becoming extremely depressed or even killing their children is a cost outweighed by the increased survival of babies whose mothers had moderate levels of neuroticism.
Let us note that nature doesn’t care about your feelings. Male praying mantises who allow themselves be eaten by their mates have more offspring than the ones who don’t, but that doesn’t mean male praying mantises enjoy getting eaten. Children who die of sickle
cell anemia don’t much appreciate that their siblings were protected from malaria, either.
An increase in neuroticism immediately after the birth of a baby may prompt a mother to take better care of it, but that doesn’t mean she enjoys the neuroticism. Neither does it mean that post-partum depression is healthy, any more than sickle cell anemia is healthy just because it’s a side effect of a trait that helps people avoid malaria.
The persistence of common, heritable psychiatric disorders that reduce reproductive fitness is an evolutionary paradox. Here, we investigate the selection pressures on sequence variants that predispose to schizophrenia, autism, bipolar disorder, major depression and attention deficit hyperactivity disorder (ADHD) using genomic data from 150,656 Icelanders, excluding those diagnosed with these psychiatric diseases. … Higher polygenic risk of autism is associated with fewer children and older age at first child whereas higher polygenic risk of ADHD is associated with having more children. We find no evidence for a selective advantage of a high polygenic risk of schizophrenia or bipolar disorder. Rare copy-number variants conferring moderate to high risk of psychiatric illness are associated with having fewer children and are under stronger negative selection pressure than common sequence variants. …
In summary, our results show that common sequence variants conferring risk of autism and ADHD are currently under weak selection in the general population of Iceland. However, rare CNVs that also impact cognition are under stronger selection pressure, consistent with mutation-selection balance. The hypothesis that a selective advantage accounts for the prevalence of sequence variants conferring risk of schizophrenia and bipolar disorder is unproven, but rather this empirical evidence suggests that common sequence variants largely escape selection as their individual effect sizes are weak.
Unfortunately, this study mostly looks at the data in aggregate, instead of breaking it down by males and females. (And I don’t know why they would bother excluding people who actually have the conditions they are trying to study, but perhaps it doesn’t make much difference.)
Thankfully, they did break down the data by male/female in the tables–Table 1 and Table 2. These tables are confusing, but the takeaway is that mental illness has a bigger effect on male fertility than female fertility.
Results Except for women with depression, affected patients had significantly fewer children (FR range for those with psychiatric disorder, 0.23-0.93; P < 10−10). This reduction was consistently greater among men than women, suggesting that male fitness was particularly sensitive. Although sisters of patients with schizophrenia and bipolar disorder had increased fecundity (FR range, 1.02-1.03; P < .01), this was too small on its own to counterbalance the reduced fitness of affected patients. Brothers of patients with schizophrenia and autism showed reduced fecundity (FR range, 0.94-0.97; P < .001). Siblings of patients with depression and substance abuse had significantly increased fecundity (FR range, 1.01-1.05; P < 10−10). In the case of depression, this more than compensated for the lower fecundity of affected individuals.
Conclusions Our results suggest that strong selection exists against schizophrenia, autism, and anorexia nervosa and that these variants may be maintained by new mutations or an as-yet unknown mechanism. Bipolar disorder did not seem to be under strong negative selection. Vulnerability to depression, and perhaps substance abuse, may be preserved by balancing selection, suggesting the involvement of common genetic variants in ways that depend on other genes and on environment.
Now, this study gets interesting in its graphs:
In every case, mental illness has a bigger effect on male fertility than female–and in the case of depression, it has no effect on female fertility.
This graph is confusingly labeled, but it is breaking down the correlation on the brothers and sisters of people with mental disorders. So the first dot represents the brothers of people with schizophrenia; the second dot represents the sisters of people with schizophrenia.
None of these effects are huge, and some of them changed when “comorbidities were included in the analysis,” though it’s not clear exactly what that means–the word comorbidity in this context refers to people with more than one diagnosis.
For the objectives of this study, we first analyzed each disorder separately without accounting for comorbidities. A secondary analysis was then performed that corrected for comorbidities by analyzing all disorders simultaneously.
So when you analyze all of the disorders together, sisters of schizophrenics had no increased fertility, and neither did the siblings of people with bipolar. Depressed men had average fertility, while depressed women actually had slightly above average fertility. The results for anorexia, substance abuse, and autism didn’t change.
Personality variation is increasingly thought to have an adaptive function. This is less clear for personality disorders (PDs)—extreme variants of personality that cause harm in most aspects of life. However, the possibility that PDs may be maintained in the population because of their advantages for fitness has been not convincingly tested. In a sample of 959 outpatients, we examined whether, and how, sexual selection acts on the seven main dimensions of personality pathology, taking into account mating success, reproductive success, and the mediating role of status. We find that, to varying extents, all personality dimensions are under sexual selection. Far from being predominantly purifying, selective forces push traits in diverging, often pathological, directions. These pressures differ moderately between the sexes. Sexual selection largely acts in males through the acquisition of wealth, and through the duration (rather than the number) of mates. This gives a reproductive advantage to males high in persistence–compulsivity. Conversely, because of the decoupling between the number of mates and offspring, the promiscuous strategy of psychopaths is not so successful. Negative emotionality, the most clinically detrimental trait, is slightly deleterious in males but is positively selected in females, which can help to preserve variation.
It’s interesting that the invention of birth control may have inadvertently selected against promiscuous psychopaths–rather similar to the theory that abortion is responsible for the decrease in crime since the early 90s.
“Negative emotionality” is likely equivalent to “neuroticism.”
There are two obvious reasons why mental illness might have more of an effect on males than females–one is that mental illness might simply be mores severe for males than females, on average. The second is that mental illness interferes more with holding down a job than with being a housewife, so women with mental illnesses have more options than men.
Less obvious, though, is that some of these traits might actually be beneficial–in small quantities–for women.
That’s enough for now; let’s continue this discussion on Friday. (Wednesday is book club.)
Note: this is just a theory, developed in reaction to recent conversations.
Let us assume, first of all, that men and women have different optimal reproductive strategies, based on their different anatomy. In case you have not experienced birth yourself, it’s a difference of calories, time, and potential death.
In the ancestral environment (before child support laws, abortion, birth control, or infant formula):
For men, the absolute minimal paternal investment in a child–immediate abandonment–involves a few minutes of effort and spoonful of semen. There are few dangers involved, except for the possibility of other males competing for the same female. A hypothetical man could, with very little strain or extra physical effort, father thousands of children–gay men regularly go through the physical motions of doing just that, and hardly seem exhausted by the effort.
For women, the absolute minimal parental investment is nine months of gestation followed by childbirth. This is calorically expensive, interferes with the mother’s ability to take care of her other children, and could kill her. A woman who tried to maximize her pregnancies from menarchy to menopause might produce 25 children.
If a man abandons his children, there is a decent chance they will still survive, because they can be nursed by their mother; if a woman abandons her child, it is likely to die, because its father cannot lactate and so cannot feed it.
In sum, for men, random procreative acts (ie, sex) are extremely low-cost and still have the potential to produce offspring. For women, random procreative acts are extremely costly. So men have an incentive to spread their sperm around and women have an incentive to be picky about when and with whom they reproduce.
This is well known to, well, everyone.
Now, obviously most men do not abandon their children (nor do most women.) It isn’t in their interest to do so. A man’s children are more likely to survive and do well in life if he invests in them. (In a few societies where paternity is really uncertain, men invest resources in their sisters’ children, who are at least related to them, rather than opting out altogether.) As far as I know, some amount of male input into their children or their sisters’ children is a human universal–the only variation is in how much.
Men want to invest in their children because this helps their children succeed, but a few un-tended bastards here and there are not a major problem. Some of them might even survive.
By contrast, women really don’t want to get saddled with bastards.
We may define sociopathy, informally, as attempting to achieve evolutionary ends by means that harm others in society, eg, stealing. In this case, rape and child abandonment are sociopathic ways of increasing men’s reproductive success at the expense of other people. (Note that sociopathy doesn’t have a formal definition and I am using it here as a tool, not a real diagnosis. If someone has a better term, I’m happy to use it.)
This is, again, quite obvious–everyone knows that men are much more likely than women to be imprisoned for violent acts, rape included. Men are also more likely than women to try to skip out on their child support payments.
Note that this “sociopathy” is not necessarily a mental illness, (a true illness ought to make a dent on one’s evolutionary success.) Genghis Khan raped a lot of women, and it turned out great for his genes. It is simply a reproductive strategy that harms other people.
So what does female sociopathy look like?
It can’t look like male sociopathy, because child abandonment decreases a woman’s fertility. For a woman, violence and abandonment would be signs of true mental defects. Rather, we want to look at ways women improve their chances of reproductive success at the expense of others.
In other words, female sociopathy involves manipulating or coercing others into providing resources for her children.
But it’s getting late; let’s continue with part 2 on Monday. (Wednesday is book club.)