Archives for posts with tag: west africans

a linkfest! (^_^) ’cause i hate linkfasts, too. (*^_^*)

Whole genome sequence analyses of Western Central African Pygmy hunter-gatherers reveal a complex demographic history and identify candidate genes under positive natural selection“African Pygmies practicing a mobile hunter-gatherer lifestyle are phenotypically and genetically diverged from other anatomically modern humans, and they likely experienced strong selective pressures due to their unique lifestyle in the Central African rainforest…. Our two best-fit models both suggest ancient divergence between the ancestors of the farmers and Pygmies, 90,000 or 150,000 years ago. We also find that bi-directional asymmetric gene-flow is statistically better supported than a single pulse of unidirectional gene flow from farmers to Pygmies, as previously suggested…. We found that genes and gene sets involved in muscle development, bone synthesis, immunity, reproduction, cell signaling and development, and energy metabolism are likely to be targets of positive natural selection in Western African Pygmies or their recent ancestors.”

Directional dominance on stature and cognition in diverse human populations“[I]ncreased homozygosity was associated with decreased trait value, equivalent to the offspring of first cousins being 1.2 cm shorter and having 10 months’ less education. Similar effect sizes were found across four continental groups and populations with different degrees of genome-wide homozygosity, providing evidence that homozygosity, rather than confounding, directly contributes to phenotypic variance. Contrary to earlier reports in substantially smaller samples5, 6, no evidence was seen of an influence of genome-wide homozygosity on blood pressure and low density lipoprotein cholesterol, or ten other cardio-metabolic traits. Since directional dominance is predicted for traits under directional evolutionary selection7, this study provides evidence that increased stature and cognitive function have been positively selected in human evolution, whereas many important risk factors for late-onset complex diseases may not have been.” – see also Not tonight, cousin from dr. james thompson. and see also Inbreeding from greg cochran. and see also Directional dominance on stature and cognition from steve hsu.

Genes Unite Executive Functions in Childhood [pdf] – h/t brian boutwell! who tweeted: “Shared genes explain all of the covariance in exec functioning items. No parenting effects to be found.”

200 Blog Posts – Everything You Need to Know (To Start) and The Rise of Universalism and Demography is Destiny, American Nations Edition and National Prosperity – jayman’s been on a roll lately! (^_^) each of these warrants your close attention!

Heritability and the evolution of cognitive traits

CNVs in neuropsychiatric disorders“Over the last few years at least 11 copy number variations (CNVs) have been shown convincingly to increase risk to developing schizophrenia: deletions at 1q21.1, NRXN1, 3q29, 15q11.2, 15q13.3 and 22q11.2, and duplications at 1q21.1, 7q11.23, 15q11.2-q13.1, 16p13.1 and proximal 16p11.2. They are very rare, found cumulatively in 2.4% of patients with schizophrenia and in only 0.5% of controls. They all increase risk for other neurodevelopmental disorders, such as developmental delay and autism spectrum disorders, where they are found at higher rates (3.3%). Their involvement in bipolar affective disorder is much less prominent. All of them affect multiple genes (apart from NRXN1) and cause substantial increases in risk to develop schizophrenia (odds ratios of 2 to over 50). Their penetrance for any neurodevelopmental disorder is high, from ∼10% to nearly 100%. Carriers of these CNVs display cognitive deficits, even when free of neuropsychiatric disorders.”

Improving Phenotypic Prediction by Combining Genetic and Epigenetic Associations [pdf] – h/t dr. xaverius!

County level homicide rates by race/ethnicity of victim and On the effects of wealth on the B-W gaps, a response to questions posed by a commenter @random critical analysis.

the much discussed post The IQ Gap Is No Longer a Black and White Issue – from chanda chisala. see also Chanda Chisala: An African Hereditarian?“If evolution applies to all of us, that includes Africans. It is perfectly possible that some African sub-groups are brighter than others. Any geographic group which takes care to encourage bright persons to marry one another could see positive effects after 20-30 generations of consistently strong selection, if those brighter parents have more surviving offspring, which is likely.” – from dr. james thompson. and see also The Jews of West Africa? from peter frost. and see also my post: there’s more to human biodiversity than just racial differences.

The Water-Crossers – from greg cochran.

Ancestry Matters: Patrilineage Growth and Extinction – h/t ben southwood! who tweeted: “Higher status Chinese patrilineages in the 18th and 19th centuries had more ancestors for hundreds of years after.”

The puzzle of European hair, eye, and skin color – from peter frost.

The people who need very little sleep

How evolutionary psychology may explain the difference between male and female serial killers“[R]esearch has shown that male serial killers tend to stalk and kill strangers. But FSKs tend to kill people they know. It seems, then, that MSKs are hunters and FSKs are gatherers.”

Is the Romantic–Sexual Kiss a Near Human Universal – apparently not! – “The romantic–sexual kiss was present in a minority of cultures sampled (46%). Moreover, there is a strong correlation between the frequency of the romantic–sexual kiss and a society’s relative social complexity: the more socially complex the culture, the higher frequency of romantic–sexual kissing.”

Men are both dumber and smarter than women – just an ok article, but interesting to see this out there *at all*.

Historical Artifacts of the Blank Slate – from helian.

On a Fast Track – Can rapid genome sequencing at birth help save lives?

Genomics Industry Generating Huge Amounts Of Data Due To DNA Sequencing – yay!

Ageing rates vary widely, says study“A study of people born within a year of each other has uncovered a huge gulf in the speed at which their bodies age…. [S]ome people had almost stopped ageing during the period of the study, while others were gaining nearly three years of biological age for every twelve months that passed.” – original research article: Quantification of biological aging in young adults.

Reacting to Spree Killings, Progressively – @thosewhocansee.

for you brits: Is that stranger opposite you a distant cousin?

bonus: Pluto’s discoverer’s ashes will be the first human remains to leave the solar system — glued to the side of a space probe – *sniff*

bonus bonus: r.i.p. conrad – *sniff*

bonus bonus bonus: tweet of the week! (~_^) >>

(note: comments do not require an email. r.i.p. conrad. *sniff*)

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i was thinking about the idea of genetic pacification, specifically via the state or some authority eliminating the most violent individuals from a population (like by execution as frost and harpending propose happened in medieval europe — see also here), and i got to wondering how other societies have meted out justice to violent offenders.

so, like hermione granger, i went to the library (heh! — no, really i just googled it) and found a few interesting things. one of them is that in traditional igbo society, the punishment for murder was left in the hands of the culprit(!) [pg. 285]:

“[T]he Igbo believe that there are both divine and man-made laws, but that the greatest penalties are reserved for breaches of divine law. Thus, a murderer would not be put on trial, because if the evidence were clear and convincing no earthly court could have jurisdiction. Indeed, the penalty prescribed by Igbo tradition is that the murderer is expected to hang himself…. [A]ny Igbo guilty of breaking a divine law would be required to do penance personally to be restored to the good favor of the gods.”

now you might think that leaving enforcement of the death penalty up to the criminal is a really bad idea — and maybe it is — but i was thinking that it might work in a shame culture. an especially strong shame culture. certainly worked in japan (at least among certain classes), which admittedly is the poster child of shame cultures.

couldn’t figure out whether or not igbo society is a shame culture, although most societies lean more toward shame than guilt. however, i do know that igbos — igbo slaves in the new world — had a reputation for committing suicide [pgs. 52-53 and 127-128 – links added by me]:

“Suicide as an ethnic or cultural ‘trait’ is usually associated with Bight of Biafra imports, especially Igbos, in the Americas. As Daniel Littlefield contends, the principle reason why they were among the least desirable of African slave imports was due to the perception among American planters that Igbo or Calabar slaves had ‘a deplorable penchant for committing suicide.’ More recently, Michael Gomez has summarized the historical and contemporary view of Igbos, noting that ‘the sources are therefore unanimous in ascribing to the Igbo greater self-destructive tendencies….’

“Biafran imports were often much cheaper than other Africans. In 1755, Igbo slaves sold in Charleston for only £270 while Africans from other regions cost £300. Henry Laurens — the noted slave merchant of colonial South Carolina — claimed in 1755 that very few Calabar Africans could be sold in the Charleston slave market when others were available. He then recommended the importation of a ‘few fine Negro Men, not Callabars.’ In a letter to Richard Oswald dated May 17, 1756, Laurens also noted that ‘slaves from the River Gambia are preferr’d to all others with us save the Gold Coast, but there must not be a Callabar among them.’

“Much of this prejudice against Igbos and others from the Bight of Biafra was due to their alleged propensity to commit suicide. Guerard complained, ‘As to bite Slaves, I protest against them at any Rate there has been so many instances of their Distroying themselves that none but the Lower sort of People will Medle with them.’ South Carolina planters who did purchase Calabar slaves were advised to buy only ‘young People from 15 to 20’ who were typically ‘not accustom’d to destroy themselves’ like their older compatriots. Based on this assumption, Henry Laurens advised that Bigt of Biafra slaves under the age of fourteen should be the only Africans from that region purchased by Low Country planters. In another assessment by ship captain John Adams, who made ten visits to the Niger River delta between 1786 and 1800, the Ibgo were considered to be ‘naturally timid and desponding, and their despair on being sent on board a ship is often such that they use every stratagem to effect the commission of suicide, and which they would often accomplish, unless narrowly watched.'”

can’t say as i blame them.

the usual explanation offered today for why slaves from the bight so often committed suicide is the belief, widely shared by peoples in west africa, in spiritual transmigration — when you die, you get to go to where your friends and family are — where your living friends and family here on earth still are. so, maybe death was not viewed as a bad solution for a biafran captive who was dragged halfway across the world. in their minds, they’d get to go home. alternatively, maybe they just didn’t want to be slaves. ooorrr…maybe there was an element of shame involved, but that’s pure speculation on my part. would be interesting to find out, though.

no idea if violence is lower among the igbo than other west african groups. need to find out. interesting that they were described as “naturally timid” though.
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a further thought i had is that perhaps long-term inbreeding can amplify shame in populations. the japanese used to marry their cousins (although i don’t know how far back that practice went) and they have an extremely strong shame culture. the arabs, too — long-term inbreeders and there’s a lot of shame there, too (family honor, etc.). perhaps shame is a sort-of familial altruism, i guess is what i’m trying to say. dunno. Further Research is Required TM.
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in the wake of chanda chisala’s post over at unz.com, several people asked me so what about the igbo? are they inbreeders or what?

i haven’t read much about the igbo, but what i do know is that they avoid all cousin marriage. don’t know how far back this goes — whether it’s pre-the introduction of christianity there or not. might be. might not be. they do practice polygamy, though, especially traditionally, which ought to narrow the genetic relatedness between individuals in the population in a way similar to cousin marriage, but…well, more on polygamy another day.

very interestingly, in their traditional society, the igbo had a “quasi-democratic republican system of government” — that’s if wikipedia is to be believed. the igbo also had non-kinship based trading associations or “houses” [pg. 137]:

“In order to exploit the rapidly expanding trade [with the newly arrived europeans] and now having the resources to do so, the delta peoples living in single settlements on the rivers and islands surrounded by protective intricate waterways developed systems of governance for their own city-states. City-states are well known in history, and many have in common a maritime presence. In Europe there were the famous Greek city-states, Athens and Sparta. In East Africa there were the coastal Swahili city-states of Mombasa, Malindi, and Kilwa among others. On the coast of West Africa there were the city-states of the Niger Delta whose citizens devised the means to adminster law and order, justice, and to make war and peace in order to promote their commerce. Each delta city-state, like those of the Greeks, had its own distinct methods of governing. Some had kings elected by the heads of wealthy and prominent families — Bonny, New Calabar, and Warri. Others were like small republics, ruled by the members of political organizations not unlike senates — Brass and those on the Cross River in Old Calabar — Creek Town, Henshaw Town, Duke Town, and Obutong. In the city-states of Old Calabar the *ekpe* or Leopard Association of wealthy men, mostly merchants, ruled the town principally to insure the flow of peaceful trade. Anyone was free to join the *ekpe* if they could afford the exorbitant entry fee that insured that those in power represented only the interests of the wealthy merchants. They regulated the terms of trade with the Europeans and made the rules by which the community was governed by its constituent organizations, known as the ‘house system.’

“Traditional African societies were based on the clans and lineages of large families that were not always the most effective means to carry on business. Rather than the family firm, the house was a cooperative commercial trading company run not by kinship but by the ability of the head of the house, his immediate family, and a host of assistants, servants, and even slaves whose status in the company depended on their success in promoting its trade rather than kinship ties or social privilege.”

the ability to form strong, functioning non-kinship based associations like that usually goes along with long-term outbreeding, in my experience.
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well, that’s all i’ve got for you for now.

i finally have admitted to myself — and now i will to you, too, dear readers — that i am too unwell at the moment to write my (what will be a lengthy!) response to prof. macdonald or, unfortunately, to work on my promised (threatened!) medieval manorialism series. am having difficulties putting two coherent thoughts together these days. (yeah, yeah — more so than usual! (~_^) ) so, i’ll just have to leave those on the back burner for now and get to them when i can. i’m due to have some medical tests done in the next few weeks, so hopefully after that, i can get myself sorted out and back in working order. in the meantime, i’ll do some more flakey posts like this which just involve me rambling some of my random thoughts.

more soon! (^_^)

previously: quick review of frost and harpending on the genetic pacification of europeans and fulani, hausa, igbo, and yoruba mating patterns

(note: comments do not require an email. igbo yam festival…in dublin, ireland!)

Stone Age skull from Kenya reveals astonishing human diversity“A partial human skull found at a site in Kenya suggests early humans living in Africa were incredibly diverse. The 22,000-year-old skull is not a new species and is clearly that of an anatomically modern human, but is markedly different from similar finds from Africa and Europe from the same time, the researchers said…. [T]he new findings suggest that during this early period of human history, Africa may have supported even greater human diversity, with small, offshoot lineages that no longer exist today….”

A New Theory on How Neanderthal DNA Spread in Asia“Researchers have discovered that Neanderthals interbred with the ancestors of Asians at two points in history, giving this population an extra infusion of Neanderthal DNA.”

Division of labor by sex and age in Neandertals: an approach through the study of activity-related dental wear“The study reveals that all individuals have cultural striations, but those detected on the adult females are longer than the striations found in adult males. Regarding the distribution of dental chipping, the prevalence of this trait is higher in the maxillary dentition of males whereas females have the majority of dental chipping on their mandibular teeth. T he differences detected on the overall activity-related dental wear pattern denote a difference or a division of labor by age and sex in Neandertals while using the mouth as a third hand, i.e., in activities other than the provisioning of food, and provide new evidence for the lifestyle of this Pleistocene fossil human species.” – h/t paleogenomics!

European languages linked to migration from the east“Large ancient-DNA study uncovers population that moved westwards 4,500 years ago.” — see also Massive Migration and Origins from greg cochran.

A story of 69 ancient Europeans – from dienekes. you need to read this one!

Genetic Characterization of Human Populations: From ABO to a Genetic Map of the British People – see map here @dienekes’.

Y chromosomes and Catalan surnames“‘By genotyping 17 Y-STRs and 68 SNPs in ~2500 male samples that each carried one of the 50 selected Catalan surnames, we could determine sets of descendants of a common ancestor, the population of origin of the common ancestor, and the date when such a common ancestor lived. Haplotype diversity was positively correlated with surname frequency, that is, rarer surnames showed the strongest signals of coancestry. Introgression rates of Y chromosomes into a surname by non-paternity, adoption, and transmission of the maternal surname were estimated at 1.5−2.6% per generation, with some local variation. Average ages for the founders of the surnames were estimated at ~500 years, suggesting a delay between the origin of surnames (twelfth and thirteenth centuries) and the systematization of their paternal transmission. We have found that, in general, a foreign etymology for a surname does not often result in a non-indigenous origin of surname founders; however, bearers of some surnames with an Arabic etymology show an excess of North African haplotypes.'” – @dienekes’.

Genetic evidence for an origin of the Armenians from Bronze Age mixing of multiple populations

Stone Age skeleton judged Norway’s oldest – 8000 years old.

Italic “Eteocretan” Sea peoples? – also @dienekes’.

Making Discoveries about Human Evolution Using 3D Technology

Make Love, Not Disease“New research on the genetic advantages of sexual reproduction has found that blending our genes through sex helps purge us of disease mutations.”

Human Genome Studies Reveal How Little Is Necessary To Explain the Human DNA Behind our Bigger Brains

Gene Changes Make Humans’ Sense of Taste Unique“Our ability to eat bitter plants help distinguish us from our ancestors and chimpanzees today.”

Dominance Genetic Variation Contributes Little to the Missing Heritability for Human Complex Traits – h/t gerome breen!

Elevated germline mutation rate in teenage fathers [pdf] – “We observe, as expected, that the overall mutation rate for fathers is seven times higher than for mothers. Also as expected, mothers have a low and lifelong constant DNA mutation rate. Surprisingly, however, we discover that (i) teenage fathers already set out from a much higher mutation rate than teenage mothers (potentially equivalent to 77–196 male germline cell divisions by puberty); and (ii) ageing men maintain sperm DNA quality similar to that of teenagers….” – h/t andrew sabisky! jayman tweeted: “8.2% false paternity rate in West Africans and 1.3% in Middle Easterners in this sample.”

Escape from crossover interference increases with maternal age – h/t billare! who tweeted: “Higher recombination rates in older women, being less concentrated in the usual hotspots. Men tend to stick w/theirs.”

Predicting and retrodicting intelligence between childhood and old age in the 6-Day Sample of the Scottish Mental Survey 1947“Terman–Merrill Stanford–Binet intelligence test scores at age 11 years correlated .72 with verbal intelligence at age 77. Adding another test from age 11 and educational took the multiple R to .81. National Adult Reading Test scores at age 77 and educational had a multiple R of .75 with IQ scores at age 11.” – h/t stuart ritchie! — see also Steady as she goes from dr. james thompson.

Peer effects: they exist but they’re not very big – from ben southwood.

Indian states: G and S factors – from emil kirkegaard.

State IQ estimates (2013) and 2013 IQ estimates by state, total and white only and State IQ estimates, blacks only (2013) and State IQ estimates, Hispanics only (2013) and IQ by race and parental educational attainment – from the awesome epigone.

Nailing liberalism / conservatism by the 50 U.S. States – from bryan pesta.

Low IQ ups risk of heavy drinking among men“The researchers analysed data collected from 49,321 Swedish males born during 1949 to 1951 and who were conscripted for Swedish military service from 1969 to 1971. IQ results were available from tests performed at conscription, and questionnaires also given at conscription provided data on total alcohol intake (consumed grams of alcohol/week) and pattern of drinking, as well as medical, childhood and adolescent conditions, and tobacco use. Adjustments were made for socio-economic position as a child, psychiatric symptoms and emotional stability and the father’s alcohol habits. ‘We found that lower results on IQ tests in Swedish adolescent men are associated with a higher consumption of alcohol, measured in both terms of total intake and binge drinking,’ Sjolund said.” h/t ruta akula!

Mathematical Proof Is Not Minutiae And Irreducible Complexity Is Not A Theory: A Final Response To Burt And Simons And A Call Tl Criminologists – from brian boutwell et al. brian tweeted: “Our second response to the call within Criminology to ban twin research.”

Familial Clustering of Tic Disorders and Obsessive-Compulsive Disorder – h/t amir sariaslan!

A two-dimensional model of psychopathy and antisocial behavior: A multi-sample investigation using items from the Psychopathy Checklist-Revised – h/t richard harper! who tweeted: “[P]sychopathy as fearless affect plus disinhibited lifestyle, then plus anti-social to get crime.”

Birds of a “bad” feather flock together: The Dark Triad and mate choice“[W]omen high in psychopathy considered the Dark Triad traits in potential male partners more physically attractive and desirable for an one-night stand, as well as a potential husband. Men who were high on psychopathy were likewise attracted to psychopathy in potential mothers.”

Cads and dads“Promiscuity and fidelity seem to be specific biological adaptations. Their manifestations in men and women are not as different as you might expect.” (whatever’s gotten into the economist these days?)

Genetic similarity between mates predicts extrapair paternity — a meta-analysis of bird studies

Who cares? Why evolution suggests parenting responsibility is seldom equally shared

Sex Differences in Preferences for Humor: A Replication, Modification, and Extension [pdf] – “[M]en prefer women who are receptive to their humor whereas women prefer men who produce humor. These findings held even after we modified Bressler et al.’s questionnaire for better conceptual validity. Furthermore, using a separate measure designed to assess trade-offs, we found that men viewed humor receptivity as a necessity and humor production as a luxury when they were asked to create an ideal long-term partner. For women, it was just the opposite.”

How Big are Psychological Sex Differences?“Sex Differences are Not Small if You Know Where to Look” – h/t claire lehmann!

Prenatal hyperandrogenic environment induced autistic-like behavior in rat offspring – h/t simon baron-cohen!

The influence of prenatal hormones on occupational choice: 2D:4D evidence from Moscow“Women in enterprising occupations exhibited lower measured 2D:4D ratios than average. Those in conventional and social work had higher 2D:4D ratios. Results confirm previous findings on 2D:4D and gender-specific occupational interests.”

Examining the Impact of Peer Group Selection on Self-Reported Delinquency: A Consideration of Active Gene–Environment Correlation – h/t jayman! who tweeted: “Do peers still influence adolescent delinquency after taking into account genetic influences? No.”

Socioeconomic status and sick leave granted for mental and somatic disorders: a prospective study of young adult twins“Low SES is associated with a higher level of sick leave granted for both mental and somatic disorders among young adults, but these associations are confounded by factors that are common to co-twins. Education and income are therefore not likely to strongly affect sick leave in young adulthood.”

List of genetic confounds – from emil kirkegaard.

Sibling differences in low birth weight, dopaminergic polymorphisms, and ADHD symptomatology“[L]ow birth weight siblings are at significantly greater risk of exhibiting symptoms of ADHD during childhood relative to their normal birth weight siblings. Moreover, possessing greater genetic risk on three dopaminergic genes (DAT1, DRD2, and DRD4) relative to a sibling appears to exacerbate the link between sibling differences in birth weight and sibling differences in ADHD symptomatology.”

What is different about the brains of “SuperAgers”“Compared with average elderly individuals, they found fewer Alzheimer-type neurofibrillary tangles and an increased packing density of von Economo neurons, especially in the anterior cingulate.”

“Bad genes” & criminal responsibility – MAOA stuff.

Heritability & the left“[T]here’s no conflict between leftism and a belief in the heritability of ability.” – that’s what i said! see also: Heritability, Left and Right.

What does it say about Owen Jones that he isn’t interested in scientific research?“What I find irritating about progressive politics is that it ignores and contradicts science, while at the same time pretending to be in favour of reason. The entire worldview is based on the tabula rasa idea of human nature which is contradicted by science. The blank slate makes the progressive goal of equality of outcomes possible; indeed, if equality is not achieved there can only be nefarious forces at work and ‘more work to be done’.” – from ed west. see also Fancy a job in academia or the media? Best brush up on the new political correctness“[Political correctness is] a faith, and it does not matter how daft the belief systems of a faith appear to a rational mind; if its critics sound backwards and out of touch and rural – literally ‘pagan’ – it will succeed.”

Both liberals and conservatives have anti-science biases, study finds“New research suggests that liberals, as well as conservatives, can be biased against science that doesn’t align with their political views.” — see also Nuclear Power and the Anti-Science Ideology of the “Progressive” Left from helian.

Why science is so hard to believe“Science appeals to our rational brain, but our beliefs are motivated largely by emotion, and the biggest motivation is remaining tight with our peers. ‘We’re all in high school. We’ve never left high school,’ says Marcia McNutt. ‘People still have a need to fit in, and that need to fit in is so strong that local values and local opinions are always trumping science. And they will continue to trump science, especially when there is no clear downside to ignoring science.'”

John Derbyshire On Culturalists vs. Biologians; Or, Where Is The American Harald Eia?

Have Mormons been bred for gullibility? – from agnostic.

Islam Is Not a Religion of the Book“By this, I mean that as a whole humans are prone to accepting the primary causal role of reflective cognition, of beliefs avowed and rationales offered. We are confident in our conscious self control, despite a robust body of cognitive psychology which implies that much of our cognition is not under the control or constraint of rational faculties. This problem is particularly extreme among intellectuals, the very class which also attempts to understand human phenomena. Through the simple process of introspection and extrapolation intellectuals tend to reduce human action to the outcome of ratiocination, inference from eternal axioms. This is wholly inadequate to a phenomenon as complex as religion.” – from razib.

Your DNA is everywhere. Can the police analyze it?“Supreme Court weighing if we must live in sealed bubbles to maintain DNA privacy.”

FDA panel could soon approve 23andMe home genetics test

Linguists link English, Hindi to single ancestor language spoken 6,500 years ago – h/t steve stewart williams!

Old India’s Village of Warriors Becomes Birthplace of Bouncers“Look closely and it becomes clear that the bouncers are all of a single physical type, their chests and biceps built like the front bumper of a sport utility vehicle. If they look like cousins, it is because they are. A startling number of them share a family name, Tanwar, and when the nightclubs close many will return to the same nearby village, a place where women walk down dusty lanes with their faces obscured by a cloth, balancing stacks of dried cow dung on their heads, much as their ancestors did three centuries ago…. The musclemen from the village of Fatehpur Beri are the descendants of the original inhabitants of the city, a genetic line that fortified itself over the course of centuries as they defended their village against waves of invaders on their way to the seat of empire. The sons and grandsons of cow and goat herders, they were born in an outpost surrounded on all sides by croplands. As Fatehpur Beri was swallowed by the expanding city, its spartan strongmen continued to train in the traditional way, stripping down to loincloths and wrestling in a circle of mud. But they were forced to look for a new line of work. ‘There is an element of the warrior in the Tanwars,’ said Ankur Tanwar, who opened the village’s first gym about a decade ago. ‘We fought with the Muslim invaders. We fought with the Britishers.'”

Ancient Egyptians had state-supported health care – at least some of them did.

bonus: Man’s best friend…unless you’re lying: How dogs can sense whether a person is trustworthy – h/t ninja economics! also: When you’re happy and you show it, dogs know it.

bonus bonus: The Cold May Have Cost Penguins Most of Their Taste Buds“Recent genetic analysis shows that penguins can’t taste sweet or bitter, and scientists think sub-zero temps may be to blame.”

bonus bonus bonus: Limpet teeth set new strength record

bonus bonus bonus bonus: Study Finds Jack Shit – h/t jayman!

bonus bonus bonus bonus bonus: Lost Sherlock Holmes story discovered

bonus bonus bonus bonus bonus bonus: a poem. (^_^)

bonus bonus bonus bonus bonus bonus bonus: #TheTitleOfMySexTape (~_^)

(note: comments do not require an email. limpet tooth.)

the war nerd says of some of the populations in nigeria:

“Nigeria’s three parts were simply nailed together by the British for their Imperial convenience: The North is a Muslim theocracy dominated by the Hausa and Fulani; the West, where the Yoruba kings (Oba) ruled city-states; and the East, where the Igbo operated on something a lot like ancient Greek assemblies, with every freeborn man entitled to a voice.”

hmmmm. doesn’t that sound interesting! more…

“The Yoruba were the first to meet the whites and take up Western education. They dealt with the British town by town; to the Yoruba, your town was more important than the broader ethnic identity. The Igbo came late to British rule but took to education very quickly. The Igbo get called ‘the Jews of Africa’ because they’re good at book-learning and business.

“And then there were the Northerners, the Hausa-dominated Muslims of the dry inland territory. In a way, you wouldn’t be far off thinking of the great Nigerian divide in California terms: the coasts vs. the hot inland redneck zone. The North, in Nigerian terms, is usually called ‘Hausa,’ or ‘Hausa-Fulani,’ but it includes the Kanuri of the Northeast, who are the most remote from the coast and the fiercest opponents of anything coastal, Christian, or modern. These were all war-forged Sahel caliphates, with no tradition of local loyalties like the Yoruba, or egalitarianism like the Igbo. They had the traditional Sahel-Muslim organization, top-down all the way: Sultan gives orders to Omda, Omda gives orders to Sheikh, Sheikh gives orders to commoners. And commoners obey.”

so we’ve got clannish/tribal northerners — the fulani and the hausa. and then we have the city-state yoruba and the “egalitarian” igbo.

i’d just like to point out that:

– the fulani prefer first or second cousin marriage and specifically father’s brother’s daughter (fbd) marriage. they’re pastoralists. there are good chances i think that, like other groups elsewhere, the fulani adopted the fbd marriage of the arabs when they converted to islam (starting in the 1400s?), but perhaps they simply practice fbd marriage because they’re pastoralists.

– the hausa also prefer cousin marriage, but it seems cross-cousin marriage, so we’re talking father’s sister’s daughter (fzd) or mother’s brother’s daughter (mbd) marriage. they are also largely muslim, but don’t seem to have adopted the fbd marriage of the arabs like their neighbors the fulani. islam has been present in hausa lands since the 1200s, but it wasn’t until the 1800s that it had fully penetrated the population.

– cousin marriage doesn’t seem to be very prevalant amongst the yoruba [pg. 74] — definitely they don’t seem to *prefer* any particular form of cousin marriage [pg. 102]. some subgroups of yoruba do have very high cousin marriage rates — the people in the town of oka akoko were found to have a consanguinity rate of 51% which included uncle-niece marriages [pg. 4]. notably, oka akoko is in a mountainous region. another case of mountaineers marrying closely? dunno. Further Research is RequiredTM!

– the igbo avoid cousin marriage altogether. no form of cousin marriage is permitted. no idea how far back this goes, but it would sure be interesting to know. if wikipedia is to be believed, the igbo had a “quasi-republican” form of government in the 1400s (see also here). wouldn’t it be cool if that system was connected to mating patterns?! dunno though. we shall have to wait and see if any further info presents itself.

oh, and btw — polygamy is present in all of these groups — and probably has been for a long, long time.

perhaps there’s something in all this, perhaps not, but these groups do seem to fit the usual pattern — closer mating patterns=more closed societies, broader mating patters=more open societies. dunno. just sayin’. Further Research is RequiredTM!

nigeria_ethnic_624

previously: the bamileke of cameroon

(note: comments do not require an email. jaja of opobo.)

if you’ve been following along, you’ll know that last year i posted about a bit of research by an anthropologist(?) by the name of joseph westermeyer the results of which suggested that peoples in lowland areas below 500m above sea level have a tendency to outbreed (i.e. avoid cousin marriage) while uplanders above 500m above sea level (and, perhaps, peoples in other marginal areas) have a tendency to inbreed (i.e. favor cousin marriage). (see also here.) westermeyer only looked at southeast asia, but i, too, seemed to be finding that pattern repeating in many places: balkans peoples – largely inbreeders, especially the ones way up in the hills; populations in the caucasuses – inbreeders; the auvergnats in france – inbreeders; heeland scots – inbreeders until quite late; afghanis – generally inbreeders, but more so in the mountains than in lowland areas; etc.

on friday, i posted about the wrist-knife wearing, ak-47 some sort-of big gun carrying turkana of east africa (kenya) who also appeared to confirm the pattern: they are a bunch of outbreeders (they avoid anything closer than second cousin marriage) and they live in a lowland region. and they’re pastoralists to boot — teh anthropologists keep saying that pastoralism leads to close marriages (like with the arabs). not!

well. last night i came across this book — Reproduction and Social Organization in Sub-Saharan Africa (1989) — which just blows this flatlanders vs. mountaineers theory right out of the water! (yipee! it’s almost like i’m doing real science! almost. ok, not really. but uncle karl would be so proud!)

in the second chapter, “The Components of Sub-Saharan Reproductive Regimes and Their Social and Cultural Determinants: The Empirical Evidence,” there’s a table on pages 74 and 75 indicating the presence or absence of cousin marriage for 47+ sub-saharan populations (data from murdock’s Ethnographic Atlas), and, as far as i can tell, there’s no rhyme or reason for why some groups inbreed and others don’t. at least the pattern (if there is one!) doesn’t appear to be connected to living in upland or lowland areas.

here is the table from the book (i’ve removed the columns that weren’t related to cousin marriage):

cousin marriage - africa

so far i’ve only run through the outbreeders (mostly), but here’s what i’ve got for where these different groups live. i’ve divvied them up by country and indicated approximately where each of the groups lives on the maps (topographic maps from wikipedia — click on maps for LARGER views — not sure who the Kru people from liberia are, so i’ve skipped them for now):

KENYA [source]
0-Kalenjin – uplanders
0-Kikuyu – uplanders
0-Kisii (AbaGusii) – uplanders
0-Luhya – uplanders
0-Luo – uplanders
0-Meru-Embu – uplanders
0-Mijikenda – lowlanders
0-Turkana – lowlanders
1-Arab groups [somalis, etc.] – lowlanders

kenya - ethnic groups + topography

CAMEROON
0-Adamawa groups – uplanders
0-Bafia – uplanders
0-Baya (Gabaya) – uplanders
0-Cameroon Western Highland groups – uplanders
0-Duala – lowlanders
0-Mandara groups – uplanders

cameroon - ethnic groups + topography

SENEGAL
0-Diola (Jola) – lowlanders

(btw – check out the HUGE velingara circular structure to the right of where i typed “diola.” impact crater? [pdf])

senegal - ethnic groups + topography

GHANA
0-Kusasi – lowlanders (below 500m)
0-Tallensi – lowlanders

ghana - ethnic groups + topography

BURKINA FASO
0-Mossi – lowlanders

burkina faso - ethnic groups + topography

see? that’s eleven upland groups right there which are — if the data are correct — outbreeders not inbreeders. either the flatlanders vs. mountaineers theory is wrong, or the sub-saharan africans are some sort of exception to this rule.

again, most of the groups practice polygamy which does complicate the picture wrt genetic relatedness. i’ll work the inbreeders into the maps one day soon. promise!

previously: this one’s for g.w. and the flatlanders vs. the mountain people

(note: comments do not require an email. velingara circular structure.)

on west africans and their (on average) greater amounts of fast-twitch muscles:

Peering Under the Hood of Africa’s Runners

“…The differences don’t stop with body shape; there is also evidence of a difference in the types of muscle fibers that predominate. Scientists have divided skeletal muscles into two basic groups depending on their contractile speed: type I, or slow-twitch muscles, and type II, fast-twitch muscles. There are two kinds of the latter: type IIa, intermediate between fast and slow; and type IIb, which are superfast-twitch. Endurance runners tend to have mostly type I fibers, which have denser capillary networks and are packed with more mitochondria. Sprinters, on the other hand, have mostly type II fibers, which hold lots of sugar as well as enzymes that burn fuel in the absence of oxygen. In the 1980s, Claude Bouchard’s team at Quebec’s Laval University took needle biopsies from the thigh muscles of white French Canadian and black West African students. They found that the Africans averaged significantly more fast-twitch muscle fibers — 67.5% — than the French Canadians, who averaged 59%….”

i am totally going with my own personal theory for why west africans have more fast-twitch muscles, and that is because of sexual selection.

for how long have various west african populations been showing off their skillz — like this! — on the dance floor?:


_____

yup. sexual selection. that’s my theory (with a small “t”), and i’m sticking with it!

(note: comments do not require an email. rude comments WILL get you banned.)