Archives for posts with tag: yanomamo

Ancient DNA Links Native Americans With Europe“…from the complete nuclear genome of a Siberian boy who died 24,000 years ago — the oldest complete genome of a modern human sequenced to date. His DNA shows close ties to those of today’s Native Americans. Yet he apparently descended not from East Asians, but from people who had lived in Europe or western Asia. The finding suggests that about a third of the ancestry of today’s Native Americans can be traced to ‘western Eurasia,’ with the other two-thirds coming from eastern Asia…. It also implies that traces of European ancestry previously detected in modern Native Americans do not come solely from mixing with European colonists, as most scientists had assumed, but have much deeper roots.” — see also: The First of the Mohicans from greg cochran.

Your face may have been sculpted by junk DNA“There is a huge degree of variation in human faces but, as family resemblances show, the overall shape is heavily constrained by genetics. However, so far, geneticists have identified only a small number of genes that influence the shape. These explain just a tiny fraction of the variation seen in human faces. According to Axel Visel of the Lawrence Berkeley National Laboratory in California and his colleagues, more variation is controlled by distant-acting enhancers. These are short sequences of DNA, in non-coding regions of the genome, that can influence the activity of the facial genes, even if they are a long way along the DNA strand.”

Behavior problems in preschool and child care centers may be an issue of genes“A new study suggests that some children may be genetically predisposed to developing behavioral problems in child care and preschool settings…. [B]irth parents who had high rates of negative emotion and self-control, based on a self-reported temperament scale, were more likely to have children who struggled with behavioral issues such as lack of self-control and anger, in child care centers. They controlled for adoptive parent’s characteristics, and still found a modest effect based on the genetic link.”

Your Ethnicity Determines the Species of Bacteria That Live in Your Mouth“[P]eople from each of the four different ethnic groups represented in the study (all participants self-identified as either Caucasian, African-American, Chinese or Latino) generally had similar species of bacteria, especially underneath the gums. As a result, simply by counting which varieties of bacteria appeared in this area, the researchers developed a model that was able to guess a person’s ethnicity with an accuracy significantly better than chance — it got it right 62 percent of the time. Some groups were even easier to identify via the bacteria than others: It could correctly identify Latinos 67 percent of the time and African-Americans with 100 accuracy. The variation along ethnic lines, they believe, is a reflection of genetics, not environment. That’s because, if you assumed that the mouth microbiome is totally dependent on environmental factors, you’d expect that members of the same ethnic group would have different mixes of bacteria depending on whether they were first-generation immigrants to the U.S. or had family histories that stretched back generations in the country. Instead, people’s background — in terms of foods they ate and other lifestyle trends — didn’t seem to have any correlation with the bacterial communities in their mouths. – h/t super bob!

Herpes virus genome traces the ancient path of human migration“Researchers…sequenced the genomes of 31 samples of herpes simplex virus type-1 to reconstruct how it hitchhiked on humans as they dispersed around the world. The results match the pattern proposed by the ‘Out of Africa’ theory, which has become the most widely accepted scenario for ancient human migration. The analysis showed that African strains of the virus contained the most genetic diversity — suggesting that they had the oldest roots.”

Genetic variation alters efficacy of antidepressant“Having a different form of a gene that regulates the brain chemical noradrenaline influences how well men remember negative memories after taking the antidepressant drug reboxetine, according to a study published in the October 23 issue of The Journal of Neuroscience. The findings demonstrate how genes can influence antidepressant response.” – see also: Genes predispose some people to focus on the negative.

Much Earlier Split for Neanderthals, Humans?“This suggests that the last common ancestor of H. sapiens and Neanderthals lived sometime earlier, perhaps as far back as one million years ago.”

Denisovans in Wallacea? – from greg cochran.

Life on Earth Was Not a Fluke“Figuring out how biomolecular self-organization happens may hold the key to understanding life on Earth formed and perhaps how it might form on other planets.” – h/t jayman!

Genetics made very simple – from dr. james thompson.

Low historical rates of cuckoldry in a Western European human population traced by Y-chromosome and genealogical data“[W]e estimate that over the last few centuries, EPP rates in Flanders (Belgium) were only around 1–2% per generation. This figure is substantially lower than the 8–30% per generation reported in some behavioural studies on historical EPP rates, but comparable with the rates reported by other genetic studies of contemporary Western European populations. These results suggest that human EPP rates have not changed substantially during the last 400 years in Flanders and imply that legal genealogies rarely differ from the biological ones.” – h/t rob brooks!

‘Endowment Effect’ Not Present in Hunter-Gather Societies“‘The more isolated Hadza traded about 50 percent of the time — which is what rational people should do,’ Azevedo said. People near the village traded about 25 percent of the time, which is much closer to the 10 percent we see with Western students.” – h/t jason collins! – previously: personality goes a long way… in which researchers find just big TWO personality traits in a group of hunter-gatherers (the tsimane).

speaking of the tsimane: UCSB anthropologist studies the evolutionary benefit of human personality traits“‘Being more extroverted, open, agreeable and conscientious –– and less neurotic –– was associated with having more kids.'” in tsimane men. (if they really have all those personality traits…see link immediately above.)

What Happens When a Language Has No Numbers? – on the pirahã. – h/t nn!

Can Your Genes Predict Whether You’ll Be a Conservative or a Liberal?“Scientific research shows political partisanship transcends economics, environment, and upbringing.” – from avi tuschman.

Life expectancy and the dawn of agriculture – from jason collins.

Origins of Americans (Looking At HLA Haplotypes) – from our very own chris davies! previously from chris: human leukocyte antigen (hla) haplotypes and human biodiversity.

Number sense in infancy predicts mathematical abilities in childhood“Preverbal number sense in 6-month-old infants predicted standardized math scores in the same children 3 years later. This discovery shows that number sense in infancy is a building block for later mathematical ability and invites educational interventions to improve number sense even before children learn to count.” – h/t simon baron-cohen!

Black Suits, Gowns, & Skin: SAT Scores by Income, Education, & Race – @the unsilenced science. see also: Obama Administration: Moynihan’s Law of Canadian Border kinda right from steve sailer.

Of Race and Intelligence – from helian.

Sex on the Mind“It is a truth universally acknowledged — at least by biologists — that every person owes his or her existence to parents who successfully reproduced, each of whom, in turn, had two parents who did the same … and so on, going back hundreds of millions of years to the first ancestral blob (or two) of protoplasmic goo that trundled onto terra firma from the early earth’s organic soup.” – from david barash. — see also: Why Have Sex? – from the advanced apes.

Lust Is Love – from heartiste.

Kids Are More Likely to Trust Attractive Adults – h/t hbd bibliography!

Asymmetries in altruistic behavior during violent intergroup conflict“Some empirical studies on intergroup conflict in hunter-gatherer societies and chimpanzees indicate that fitness relevant risks and potential benefits of attacks and defenses might have differed substantially under ancestral conditions. Drawing on these studies, it is hypothesized that the success of defenses was much more important for individual and kin survival and that a disposition to act altruistically during intergroup conflict is thus more likely to evolve for the strategic situation of defense…. Analyzing detailed historical case data from 20th century wars, this study finds that altruistic behavior towards members of the in-group indeed seems to occur more frequently when soldiers are defending themselves and their comrades against enemy attacks.” – h/t hbd bibliography!

Who gives? Multilevel effects of gender and ethnicity on workplace charitable giving.“[E]thnic minorities donate less money to workplace charity than do Whites.” – and men less than women. – via richard lynn @amren.

Paradoxes of the Nordic Model II“Denmark is a high trust, highly cooperative society. There is very low crime. Most parked bicycles are not even locked. Bank employees may not work very efficiently, but nobody tried to swindle me. In theoretical terms, what it means is that when there are very few defectors, the amount of common good produced overall is maximized. So everybody is well of, even though they don’t work hard – but they don’t free-ride, either….” – from peter turchin.

Ma’am, Your Burger Has Been Paid For – paying it forward in america! – h/t charles murray!

Napoleon Chagnon: The Fierce Sociobiologist“[Yanomamo] Men from the highland villages were much less belligerent than men from villages along the river. Heterogeneity in belligerence existed even within this single tribe.”

Where Have All the Geniuses Gone?

Aboriginal Hunting Practice Increases Animal Populations – monitor lizards, anyway.

“Science has lost its way, at a big cost to humanity“Researchers are rewarded for splashy findings, not for double-checking accuracy. So many scientists looking for cures to diseases have been building on ideas that aren’t even true.” – h/t outsideness! – see also: Trouble at the lab“Scientists like to think of science as self-correcting. To an alarming degree, it is not.”

These Unresolved Ethical Questions Are About to Get Real

bonus: Hunted by their own government – the fight to save Kalahari Bushmen“Survival International, which campaigns on behalf of tribal peoples, has called for tourists to boycott holidays in Botswana, which is forcing Kalahari Bushmen off their reserves.”

bonus bonus: How did ancient Greek music sound? – beautiful apparently! – h/t ed west!

bonus bonus bonus: Author: In China, ‘everyone is guilty of corruption’ – on guanxi.

bonus bonus bonus bonus: The couple having four babies by two surrogates“A British couple are to become parents of two sets of twin babies carried by two Indian surrogate women they have never met. Experts say twiblings – or children born to separate surrogates but created from the same batch of embryos – are not uncommon in India.”

bonus bonus bonus bonus bonus: Gang Rape in India, Routine and Invisible“[T]he Mumbai case provides an unusual glimpse into a group of bored young men who had committed the same crime often enough to develop a routine. The police say the men had committed at least five rapes in the same spot. Their casual confidence reinforces the notion that rape has been a largely invisible crime here, where convictions are infrequent and victims silently go away.” – see also: Trying to Make Sense of India’s Sexual Violence, State by State from t.greer.

bonus bonus bonus bonus bonus bonus: Insects aren’t gay, they’re just enthusiastic! Scientists discover same-sex mating in bugs is down to a rush to reproduce – h/t hbd bibliography!

bonus bonus bonus bonus bonus bonus bonus: Mysterious hum keeping people up all night ‘could be mating fish’“A council investigation was launched in Hythe, Southampton after some people had to move away because of the drone ‘pulsating’ through their homes.”

bonus bonus bonus bonus bonus bonus bonus bonus: Are conspiracy theories destroying democracy?“The more information we have about what governments and corporations are up to the less we seem to trust them. Will conspiracy theories eventually destroy democracy?” – h/t avi tuschman!

(note: comments do not require an email. monitor lizard!)

Digesting Milk in Ethiopia: A Case of Multiple Genetic Adaptations“A team of geneticists from UCL, University of Addis Ababa and Roskilde University have shown that five different alleles are found in the Ethiopian population that cause adult lactase production, one of which is newly confirmed.” – h/t andrew badenoch!

Friendship and Natural Selection“More than any other species, humans form social ties to individuals who are neither kin nor mates, and these ties tend to be with similar people. Here, we show that this similarity extends to genotypes. Across the whole genome, friends’ genotypes at the SNP level tend to be positively correlated (homophilic); however, certain genotypes are negatively correlated (heterophilic). A focused gene set analysis suggests that some of the overall correlation can be explained by specific systems; for example, an olfactory gene set is homophilic and an immune system gene set is heterophilic.” – via charles!

Scientists to sequence genomes of hundreds of newborns

Bone dates ‘earliest northerner’, say archaeologists in Liverpool“Liverpool John Moores University and the University of Nottingham analysed a leg bone found in Cumbria and found it to be more than 10,000 years old.” – [winter is coming....]

Convergent evolution seen in hundreds of genes“Bats and dolphins may have developed echolocation via similar mutations.”

Darkness in Anthropology: A Conversation with Napoleon Chagnon“Probably the single most anthropologically unacceptable thing I did was to take ‘biology’ seriously…. I began using commonly known ways to ‘measure’ relatedness between organisms — Sewall Wright’s coefficient of inbreeding and its extended concept, the coefficient of relatedness. This was very unusual in cultural anthropology. In short, I was discussing Yanomamö kinship with *the biological meaning* of kinship in mind — at a time when the vast majority of cultural anthropologists assumed that ‘kinship’ and ‘the biological meaning of Yanomamö kinship’ were, at best, only vaguely similar and any allusion to this was generally ‘suspect.’ But since ‘kinship’ was traditionally a central focus of anthropological theory, I began developing ways to show precisely, using my meticulous genealogies on the Yanomamö, that people took sides in fights according to how closely *genetically* they were related to each other and fought against people they were *less related to genetically*. Many of the most prominent anthropologists held the extreme view that ‘kinship’ among humans had *nothing* to do with the biological meaning of kinship as is assumed in the fields of biology, genetics, or animal husbandry. A common claim was something to the effect that ‘whatever kinship among humans was about, it was NOT about biology.'” – h/t g-nice!

Penn Biologists Show That Generosity Leads to Evolutionary Success – stewart and plotkin “examined the outcome of the Prisoner’s Dilemma as played repeatedly by a large, evolving population of players. While other researchers have previously suggested that cooperative strategies can be successful in such a scenario, Stewart and Plotkin offer mathematical proof that the *only* strategies that succeed in the long term are generous ones.”

Confusions about race: A new installment [pdf] – from neven sesardic. – h/t holtz!

Why Do Black Women Have A Higher Risk of Death from Heart Disease Than White Women? – more atypical symptoms than white women, apparently.

How Inbred are Europeans? – now that’s my kinda post! (^_^) – from jayman.

Arabs and Liberal Democracy: A Primer – @thosewhocansee.

On the Relevance of Science to Morality“[I]ssues of morality can’t be answered by scientific experiments because there are no such entities as issues of morality…. Moral emotions are part of the behavioral repertoire of several species of animals, including human beings.” – helian makes me smile. (^_^)

The Clannish World of Organized Crime“[T]he way clannishness and OC go hand in hand like described above can’t be a coincidence. Rather, it makes perfect sense given the very definitions of these concepts. Clannishness is taking care of yourself and your group, often with violence, at the expense of other people and society. OC can be described in the exact same way.” – oh, yes. – from staffan.

Obesity in Germany: The fault-line divides the nation again – from agnostic.

Why are we the naked ape?“Loss of body hair was a long-term evolutionary trend in ancestral hominids and even ancestral primates, being perhaps a response to a greater need for social signaling. In ancestral humans, the selection pressure seems to have gone through three stages, initially targeting infants and only later women and then men.” – from peter frost.

Are girls too normal? Sex differences in intelligence“Girls are more normal, boys are more extreme, so there are more boys at extremes, and the more extreme the extremes, the more boys.” – from dr. james thompson. – [are girls too normal? - i'm not! (~_^) ]

Spot The Alpha – heh! – from heartiste (who else?).

National stereotypes of business meetings – @steve sailer’s.

Individualism and Collectivism: U.S. State Comparison – from benjamin david steele.

Racial Differences in Masculinity-Femininity? – @the occidentalist. h/t jayman!

The New Science of Mind“Any discussion of the biological basis of psychiatric disorders must include genetics. And, indeed, we are beginning to fit new pieces into the puzzle of how genetic mutations influence brain development.”

Ability to delay gratification may be linked to social trust“A person’s ability to delay gratification — forgoing a smaller reward now for a larger reward in the future — may depend on how trustworthy the person perceives the reward-giver to be, according to a new study….”

Bigger and healthier: European men grow 11cm in a centurybigger is better! (~_^)

A Game of Homs“What striking about Syria is how so many people insist on speaking about it in profoundly moralistic, Manichaean terms. This is complete nonsense, given that its civil war isn’t a showdown between democracy and dictatorship, but an ethnic and religious conflict. Here’s a more realistic guide.” – really good stuff from anatoly!

Ed West interview: debating the ‘illusions’ of a diverse society

America’s greatest days lie ahead – provided she is true to herselft.greer says: “Daniel Hannan(!) reviews America 3.0 and its Emmnauel Todd theory of America.”

Children with behavioral problems more at risk of inflammation“Children with behavioral problems may be at risk of many chronic diseases in adulthood including heart disease, obesity, diabetes, as well as inflammatory illnesses (conditions which are caused by cell damage).”

Slaughtered bodies stripped of their flesh – a gruesome glimpse of Iron-Age massacre at UK’s largest hill fort“Hundreds if not thousands stripped of their flesh and chopped up, say archaeologists.”

Carbon dating shows ancient Egypt’s rapid expansion“The powerful civilisation of ancient Egypt took just a few centuries to build, according to a radiocarbon dating study that sets the first solid chronology for the period…. Archaeologists have assumed it developed gradually from the pastoral communities that preceded it, but physicist Mike Dee from the University of Oxford and his colleagues now suggest that the transition could have taken as little as 600 years.” – see also A chronology of ancient Egypt @dienekes’.

Declassified spy photographs reveal lost Roman frontier“Declassified spy photography has uncovered a lost Roman Eastern frontier, dating from the second century AD. Research by archaeologists at the Universities of Glasgow and Exeter has identified a long wall that ran 60 kilometers from the Danube to the Black Sea over what is modern Romania. It is considered the most easterly example of a man-made frontier barrier system in the Roman Empire.” – trajan’s rampart!

Melting Snow Reveals Iron Age Sweater“A boat neck sweater made of warm wool and woven in diamond twill was a dominating fashion trend among reindeer hunters 1,700 years ago, according to researchers who have investigated an extremely well preserved Iron Age tunic found two years ago under melting snow in Norway.”

bonus: Underwater volcano is Earth’s biggest“Tamu Massif rivals the size of Olympus Mons on Mars.” – cool!

bonus bonus: Evidence Found for Planet-Cooling Asteroid 12,900 Years Ago – which triggered the agricultural revolution…?

bonus bonus bonus: Making Sense of the Syrian Rebels’ Order of Battle

bonus bonus bonus bonus: Two years after Libya’s revolution, government struggles to control hundreds of armed militias – h/t mark krikorian! see also: Special report: We all thought Libya had moved on – it has, but into lawlessness and ruin. =(

bonus bonus bonus bonus bonus: Car-theft epidemic at the border with Poland [and germany] – “Brandenburg police has repeatedly scolded German car owners for being naive. ‘They simply park their cars in the street….'” – imagine that!

bonus bonus bonus bonus bonus bonus: The city that went to the dogs: With 60,000 on the streets, there is one stray for every 31 people in Bucharest

bonus bonus bonus bonus bonus bonus bonus: Poll: Majority Of Americans Approve Of Sending Congress To Syria – heh! (~_^) – via mr. mangan, esq.

(note: comments do not require an email. wtf is this weird web-tower thing?)

The breeder’s equation – R = h2S – from greg cochran.

Making Europeans kinder, gentler – from peter frost.

Napoleon Chagnon: Blood is their Argument“‘It’s almost always for revenge. Blood is their argument. The Yanomamö will always attempt to avenge the death of a kinsman. It may take them a long time, and when the tables are turned on the guys that did it, like they get too small as a group, then it may appear to be a preemptive strike, but it has some historical roots. It’s almost never a case where they attack another Yanomamö village preemptively for no reason at all. It’s usually a consequence of some previous argument.'” – via habitable worlds: Darwin’s Dangerous Clan. see also Historical Reality: Infanticide vs Abortion @occam’s razor.

Zazes, Flurps and the Moral World of Kids – four-year-olds “assume that everybody else will be biased against other groups. And this extends beyond race, gender and religion to the arbitrary realm of Zazes and Flurps.” – h/t charles!

Manly Sweat Makes Other Men More Cooperative“A chemical component of other guys’ sweat makes men more cooperative and generous, new research says. The study is the first to show that this pheromone, called androstadienone, influences other men’s behavior and reinforces the developing finding that humans are susceptible and responsive to these chemical signals.”

120,000 Years of Cancer“A Neanderthal who lived more than 120,000 years ago had cancer of the bones, in the earliest known incidence of the disease found in the human fossil record, a new study reports.”

How does inbreeding avoidance evolve in plants?“Case study of Leavenworthia suggests that loss of complex traits may be reversed.”

A Requiem for Science – from john derbyshire.

The Gentleman Naturalist“[Darwin and Wallace's] papers were presented to the Linnean Society in July 1858, and met with silence: as Desmond and Moore say, ‘no fireworks exploded, only a damp squib’.”

ORIGINAL PAPER: How clever were the Victorians? A comment on Woodley et al. (2013) – from elijah armstrong!

The Onset and Development of B-W Ability Differences: Early Infancy to Age 3 (Part 1) – from jason malloy. see also dr. thompson: By the age of three, a clear gap in ability.

Slowing immigrant assimiliation“George Borjas’s latest paper released at NBER shows that newer waves of immigrants are less able to assimilate than previous immigrants waves.” – @gucci little piggy. see also: Two books, one conclusion. Immigration has been and is too high. @conservative home (u.k.).

The Real Threat to British Elites“Why British elites covered up the Pakistani pimps’ child gangrape horror.” – from steve sailer.

Population history of the Caribbean (Moreno-Estrada et al. 2013) and IBD sharing between Iberians and North Africans (Botigué et al. 2013) – @dienekes.

How Game Might Have Benefited Jason Richwine – ask and ye shall receive! [no double entendre intended. you guys have been reading too much roissy! (~_^) ] – good stuff from heartiste! (thanks, h!)

Geography, race, religion, and class“[W]ealthy suburban and rural blacks go to church more than poor inner-city blacks do, and wealthy suburban and rural whites attend more than poor inner-city whites do.” – from the awesome epigone.

People Are Overly Confident in Their Own Knowledge, Despite Errors

Ethnic policy in ancient Japan – from spandrell!

“‘[F]ertility may be a strategic choice for ethnic groups engaged in redistributive conflict'” [pdf] – via race/history/evolution notes.

Atheists turn to science during times of stress

Genetics and the increase in obesity – from jason collins. see also mr. mangan, esq.: The Rise of Mental Illness and Obesity.

100 Blog Posts – A Reflection on HBD Blogging And What Lies Ahead – from jayman. and jayman jr.!! (^_^)

Back in the saddle – m.g. @thosewhocansee is back (or will be back shortly)! yaaaaayyyyyy!!!! h/t nelson!

Human Biodiversity – Things You Are Not Supposed to Know About – from staffan!

bonus: Review of “Blood Meridian” by Cormac McCarthy – from foseti. see also this great set of “randoms” from mr. f. you should click through to every last one of them (if you haven’t already)!

bonus bonus: How the chicken lost its penis – a lesson for all!

bonus bonus bonus: Leviathan Unbound – from malcolm pollack.

bonus bonus bonus bonus: light entertainment – @PRISM_NSA on twitter and Obama Is Checking Your Email on tumblr. (~_^)

bonus bonus bonus bonus bonus: Life wasn’t all trouble at mill“[T]he Industrial Revolution came as a tremendous boom to a lot of working people: they earned far more than they had done before, escaped lives of crushing poverty and for the first time began to exert some measure of control over their lives.”

bonus bonus bonus bonus bonus bonus: Is Humbert Humbert Jewish?

bonus bonus bonus bonus bonus bonus bonus: The Fight to Save Ping Pong – excellent!

(note: comments do not require an email. dirty jobs – sexing baby chickens!)

i sure hope this isn’t true (links added by me):

“The Weird Irony at the Heart of the Napoleon Chagnon Affair”
“By John Horgan

“…I was still working on my review of [patrick tierney's] Darkness [in El Dorado] when I received emails from five prominent scholars: Richard Dawkins, Edward Wilson, Steven Pinker, Daniel Dennett and Marc Hauser. Although each wrote separately, the emails were obviously coordinated. All had learned (none said exactly how, although I suspected via a friend of mine with whom I discussed my review) that I was reviewing Darkness for the Times. Warning that a positive review might ruin my career, the group urged me either to denounce Darkness or to withdraw as a reviewer.

“I responded that I could not discuss a review with them prior to publication. (Only Dennett persisted in questioning my intentions, and I finally had to tell him, rudely, to leave me alone. I am reconstructing these exchanges from memory; I did not print them out.) I was so disturbed by the pressure from Dawkins et al — who seemed to be defending not Chagnon per se but the sociobiology paradigm — that I ended up making my review of Darkness more positive….”

=/

see also: napoleon chagnon @wikipedia.

(note: comments do not require an email. yanomamo guys.)

the yąnomamö of brazil/venezuela:

these guys are the un-semai — from steven pinker’s The Better Angels of Our Nature:

“Helena Valero, a woman who had been abducted by the Yanomamö in the Venezuelan rain forest in the 1930s, recounted one of their raids:

“‘Meanwhile from all sides the women continued to arrive with their children, whom the other Karawetari had captured…. Then the men began to kill the children; little ones, bigger ones, they killed many of them. They tried to run away, but they caught them, and threw them on the ground, and stuck them with bows, which went through their bodies and rooted them to the ground. Taking the smallest by the feet, they beat them against the trees and rocks. . . . All the women wept.'”

yikes. =/

according to pinker, the annual yąnomamö death rate due to warfare was something like 275 out of 100,000 in the mid-twentieth century. definitely higher numbers than the semai:

pinker - war deaths per 100,000 people per year - the yanomamo

warfare here, of course, refers to battles between villages (perhaps, too, between alliances of villages — i don’t know — haven’t finished reading the book yet!). and because there is so much violence between villages, the yąnomamö have to be wary [pg. 131]:

“Daily activities begin early in a Yanomamo village. One can hear people chatting lazily and children crying long before it is light enough to see. Most people are awakened by the cold and build up the fire just before daybreak….

“The entrances are all covered with dry brush so that any attempt to get through them is heard all over the village. There is always a procession of people leaving the village at dawn to relieve themselves in the nearby garden, and the noise they make going in and out of the village usually awakens the others….

This is also the time of day when raiders strike, so people must be cautious when they leave the village at dawn. If there is some reason to suspect raiders, they do not leave the confines of the upright log palisade that surrounds the village. They wait instead until full light and leave the village in armed groups.”
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would it surprise you to learn that the yąnomamö are pretty closely inbred? from pinker:

“Among the Yanomamo … two individuals picked at random from a village are related almost as closely as first cousins, and people who consider each other relatives are related, on average, even more closely.”

the yąnomamö prefer to marry their first cousins — specifically their cross cousins, outside their patrilineage, but within the village. from chagnon [pgs. 141, 144, & 150]:

“[M]en [can] marry only those women they put into the kinship category *suaboya.* By collecting genealogies that showed who was related to whom in specific ways, it was then possible to specify any man’s ‘nonmarriageable’ and ‘marriageable’ female kin. As it turned out, men could marry only those women who fell into the category of kin we would call ‘cross-cousin.’ These are, from a man’s point of view, the daughters of his mother’s brother or the daughters of his father’s sister…. The rule, therefore, is that the Yanomamo marry bilateral cross-cousins. Bilateral means ‘both sides,’ that is, father’s *and* mother’s side of the family. From their vantage, therefore, one of their marriage rules is, ‘Men should marry their *suaboya*.’ In a very real sense, this is like saying ‘We marry our wives,’ for men call their wives and their female cross-cousins suaboya. Thus, to ask, ‘Whom do you marry?’ seems somewhat peculiar to them. They marry their wives, as real people are supposed to do….

“The general Yanomamo rule about marriage, insofar as it can be phrased in terms of descent rule, is simply that everyone *must* marry outside of his or her own patrilineal group. The Yanomamo patrilineage is, therefore, an exogamic group: All members must marry outside of it into a different patrilineage…. In Yanomamo society, one’s cross-cousins will always belong to a different lineage but parallel cousins will belong to your own lineage….

“Each person belongs to the patrilineage of his or her father, and all men marry women who are *simultaneously* their Father’s Sister’s Daughters (hereafter FZD) *and* their Mother’s Brother’s Daughters (hereafter MBD). …

“The ‘ideal’ model presented above (Figure 4.8) represents each man as marrying a woman who is simultaneously his MBD and FZD. In actual practice, this rarely happens, largely because of physiological and demographic reasons…. What *does* happen is that men marry women who are sometimes FZDs or sometimes MBDs.

how long have they been mating like this? who knows?

read more about yąnomamö marriage patterns here.
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now, excuse me a sec while i indulge my other pet interest: the types of houses that different peoples construct for themselves (and their families). we saw before that quite a few cousin marrying populations live in homes that exclude outsiders (courtyard houses, for instance), while non-cousin marrying populations like the english live in homes that sorta invite outsiders in (like around the village green).

what sort of houses do you think the yąnomamö live in (traditionally anyway — hint: a shabono — more cool pics via google)?:

shabono

from chagnon again [pg. 131]:

Kaobawa’s village is oval shaped. His house is located among those of his agnatic kinsmen, that is, men related through males ties. The occupy a continuous arc along one side of the village. Each builds his own section of the village, but in such a way that the roofs coincided and could be attached by simply extending the thatching. When completed, the village looked like a continuous, oval-shaped lean-to because of the way in which the roofs of the discrete houses were attached. Each house, however, is owned by the family that built it. Shararaiwa, Kaobawa’s youngest brother, helped build Kaobaw’s house and shares it with him. He also shares Koamashima, Kaobawa’s younger wife….”

apparently, there can be several shabonos in one village. the way that the extended family/clan’s houses all open on to the family’s central yard, and the houses’ backs face out to the world in a very uninviting way to strangers, reminds me of other inbred groups’ clan houses — like the hakka walled villages of southern china. those two — the shabonos and the hakka walled villages — are both even defensive in nature — the shabonos have a pallisade around them.
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h/t henry harpending. (^_^)

previously: when did you stop beating your wife? and the semai and there’s no place like home

(note: comments do not require an email. yąnomamö kid.)

from The Yanomamo by napoleon chagnon [pgs. 126-27]:

“Women must respond quickly to the demands of their husbands and even anticipate their needs. It is interesting to watch the behavior of women when their husbands return from a hunting trip or a visit. The men march dramatically and proudly across the village and retire silently into their hammocks, especially when they bring home desirable food items. The women, no matter what they are doing, hurry home and quietly but rapidly prepare a meal. Should the wife be slow at doing this, some irate husbands scold them or even beat them.

“Most physical reprimands meted out take the form of blows with the hand or with a piece of firewood, but a good many husbands are more severe. Some of them chop their wives with the sharp edge of a machete or ax or shoot them with a barbed arrow in some nonvital area, such as the buttocks or leg. Some men are given to punishing their wives by holding the glowing end of a piece of firewood against them, producing painful and serious burns. The punishment is usually, however, more consistent with the perceived seriousness of the wife’s shortcomings, more drastic measures being reserved for infidelity or suspicion of infidelity. It is not uncommon for a man to injure his sexually errant wife seriously and some men have even killed wives for infidelity by shooting them with an arrow.

Women who are not too severely treated might even measure their husband’s concern in terms of the frequency of minor physical reprimands they sustain. I overheard two young women discussing each other’s scalp scars. One of them commented that the other’s husband must really care for her since he has beaten her on the head so frequently!

“A woman can usually depend on her brothers for protection. They will defend her against a cruel husband. If a man is too severe to a wife, her brothers may take the woman away from him and giver her to another man. It is largely for this reason that women usually abhor the possibility of being married off to men in distant villages; they know that their brothers cannot protect them under these circumstances. Women who have married a cross-cousin have an easier llife, for they are related to their husbands by cognatic ties of kinship as well as by marriage. Bahimi is, for example, Kaobawa’s Mother’s Brother’s Daughter (MBD), and their marital relationship is very tranquil. He does punish Bahimi occasionally, but never cruelly. Some men, however, seem to think that it is reasonable to beat their wife once in a while as if the objective is ‘just to keep her on her toes.'”

yanamamo men married to their mbds (or any cousin) will prolly physically hurt their wives less, on average, than men not married to theirs since the man+mbd couples are more related to one another than the non-cousins couples. wouldn’t make any sense for lots of excessive (i.e. lethal) violence towards very close relatives to have been selected for. (although see below.)

however, the fact that there is quite a bit of violence towards women in yanomamo society (yes, i know that there’s a lot of violence in yanomamo society in general), and the fact that yanomamo women prefer to marry close to home, reminds me of arab/middle eastern/maghrebian/ mashriqian/south asian muslim societies where very close marriage (fbd marriage) is the preferred form.

very close marriage is also preferred in yanomamo society, albeit of a different form (the preferred form is not parallel-cousin marriage like the arabs, but cross-cousin marriage to a mbd, but since two clans usually exchange brides exclusively — or that’s the ideal anyway — a man’s mbd is also often his father’s sister’s daughter [fzd] as well. i’ll explain it in a later post — for now, see here.)

my impression is that when you have a lot of very close marriage, you get what i’ve (jokingly) dubbed inclusive-inclusive fitness behaviors like honor killings and the like — extreme forms of “altruistic” behaviors in which even family members can be sacrificed for the benefit of the remaining family members. weird, but true (i think). i think the killing of unfaithful yanomamo wives by husbands who are usually relatives of some sort is another example of this. on the other hand, maybe it’s just that the yanomamo have an extremely strong violent streak.

more on the yanomamo anon!

see also: Domestic violence gets evolutionary explanation

(note: comments do not require an email. yanomamo girl.)

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