Archives for posts with tag: incest

Europeans drawn from three ancient “tribes”“The modern European gene pool was formed when three ancient populations mixed within the last 7,000 years, Nature journal reports. Blue-eyed, swarthy hunters mingled with brown-eyed, pale skinned farmers as the latter swept into Europe from the Near East. But another, mysterious population with Siberian affinities also contributed to the genetic landscape of the continent.” – see also: Before Slavery“From what I can see so far, it looks as the invaders killed all the LBK-descended farmers in northern Europe, or nearly so. The locals had had long trapezoidal houses clustered in small villages: the Corded Ware culture has almost no buildings at all, and a lot less agriculture. They didn’t make the EEF guys serfs and get a cut of their grain – the villages disappeared. They didn’t tax them, but then money and bureaucracy hadn’t been invented yet. Same for slavery: hadn’t been invented, probably. Judging from the mtDNA patterns, they didn’t even grab many of the nubile women. The genetic mix changes little as you move across the north European plain: if the invaders were picking up local genes as they rolled along, it should have. We used to call Corded Ware the Battle-Axe culture, but that’s too accurate for comfort.” – from greg cochran.

They weren’t wimps: how modern humans, like Neanderthals, braved the northern cold“Recent finds at Willendorf in Austria reveal that modern humans were living in cool steppe-like conditions some 43,500 years ago – and that their presence overlapped with that of Neanderthals for far longer than we thought.” – h/t mr. robert ford!

Stone Age groups made similar toolmaking breakthroughs“Different palaeolithic populations around the world might have developed a crucial toolmaking skill independently. This conclusion, based on the analysis of hundreds of artefacts from a recently excavated archaeological site in Armenia, weakens a long-held theory that Stone Age people in Eurasia learnt sophisticated techniques from migrating African tribes. The work is published in Science.”

Human paternal and maternal demographic histories: insights from high-resolution Y chromosome and mtDNA sequences“Comparisons of maternally-inherited mitochondrial DNA (mtDNA) and paternally-inherited non-recombining Y chromosome (NRY) variation have provided important insights into the impact of sex-biased processes (such as migration, residence pattern, and so on) on human genetic variation…. Our results confirm the controversial assertion that genetic differences between human populations on a global scale are bigger for the NRY than for mtDNA, although the differences are not as large as previously suggested. More importantly, we find substantial regional variation in patterns of mtDNA *versus* NRY variation.” – h/t juan fernández lópez! – see also: New analysis of human genetic history reveals female dominance – (heh. that was a nice twist on the story! (~_^) ) h/t frau katze!

23andMe mega-study on different American groups – @dienekes’. see also: The genetic ancestry of African, Latino, and European Americans across the United States.

Admixture in Latin America: Geographic Structure, Phenotypic Diversity and Self-Perception of Ancestry Based on 7,342 Individuals“We estimated individual ancestry proportions in a sample of 7,342 subjects ascertained in five countries (Brazil, Chile, Colombia, México and Perú). These individuals were also characterized for a range of physical appearance traits and for self-perception of ancestry. The geographic distribution of admixture proportions in this sample reveals extensive population structure, illustrating the continuing impact of demographic history on the genetic diversity of Latin America. Significant ancestry effects were detected for most phenotypes studied. However, ancestry generally explains only a modest proportion of total phenotypic variation. Genetically estimated and self-perceived ancestry correlate significantly, but certain physical attributes have a strong impact on self-perception and bias self-perception of ancestry relative to genetically estimated ancestry.” – see also razib: The Phenotypic and the Genotypic.

Ashkenazi Jewish population has distinctive, yet similar genomes“Post-population bottleneck, descendants of Eastern European Jews are all 30th-ish cousins…. Compared to genomes of modern Europeans—in this case, the genomes of 26 Flemish people—the Ashkenazi genomes have 47 percent more novel DNA differences per genome. These DNA variants, while novel, are population specific; sequence sharing, where two individuals have a set of the same variants, is eight percent more abundant among the Ashkenazi Jews than it is between the two populations or even among the Flemish genomes.” – h/t billare!

Why Did Civilization Lag in Africa? – from steve sailer.

Force of nature gave life its asymmetry“‘Left-handed’ electrons destroy certain organic molecules faster than their mirror versions.”

make sure not to miss jayman’s new Obesity Facts page. and give him some money, too! (^_^)

A fruitful encounter“Did the Christian doctrine of original sin create the guilt cultures of Northwest Europe? Or did the arrow of causality run the other way?” – from peter frost.

Review: G Is for Genes: The Impact of Genetics on Education and Achievement (Kathryn Asbury, Robert Plomin) – from emil kirkegaard.

The hereditarian hypothesis almost certainly true“Surely, there are huge benefits to being the first author to publish a study that almost conclusively disproves the genetic model for AA’s. Researchers with access to the data have a strong incitement to publish such a study. If the data supports the view, they have all the necessary means too. Since they haven’t published it, we can hence infer that the data does not support the politically favorable non-genetic conclusion, but instead the genetic model.” – also from emil kirkegaard.

Cognitive ability and party identity in the United States“[I]ndividuals who identify as Republican have slightly higher verbal intelligence than those who identify as Democrat…. [H]igher intelligence among classically liberal Republicans compensates for lower intelligence among socially conservative Republicans.” – the results suggest. – h/t stuart ritchie!

Lighter-skinned minorities are more likely to support Republicans

A study of the performance of Egyptian college students on the Advanced Progressive Matrices“The Egyptian raw scores were transformed to British IQ equivalents using the published 1992 British norms for the APM, on which the sample obtained a British IQ of 89.5. Science students obtained a significantly higher average mean score than arts students by 7.5 IQ points. Male students obtained a non-significantly higher average IQ than female students 1.2 IQ points. Male students had greater variability than the female students.” – h/t erwin schmidt!

The Available Pool – ed realist goes all voldemort on us. again.

Epigenetics, the Glory and the Hype“Epigenetics is real. But it doesn’t change everything. That needs to be said, because people seem to get the impression that everything is changed.” – from razib.

Human preferences for sexually dimorphic faces may be evolutionarily novel [pdf] – “A large literature proposes that preferences for exaggerated sex typicality in human faces (masculinity/femininity) reflect a long evolutionary history of sexual and social selection. This proposal implies that dimorphism was important to judgments of attractiveness and personality in ancestral environments. It is difficult to evaluate, however, because most available data come from large-scale, industrialized, urban populations. Here, we report the results for 12 populations with very diverse levels of economic development. Surprisingly, preferences for exaggerated sex-specific traits are only found in the novel, highly developed environments. Similarly, perceptions that masculine males look aggressive increase strongly with development and, specifically, urbanization.” – h/t jayman!

Do your genes skew how you taste alcohol?“A new study shows that how people perceive and taste alcohol varies as a result of genetics. The scientists focused on three chemosensory genes—two bitter-taste receptor genes known as TAS2R13 and TAS2R38 and a burn receptor gene, TRPV1. The research is the first to consider whether variation in the burn receptor gene might influence alcohol sensations, which has not previously been linked to alcohol consumption.” – alcohol tastes gooooood! (~_^) – h/t phillip melton!

Parent–Offspring Similarity for Drinking: A Longitudinal Adoption Study [pdf] – “Findings imply that genetic influences on drinking behavior increase with age while shared family environment influences decline, especially during the transition from late-adolescence to early adulthood.” – h/t emil kirkegaard!

Violent Video Games and Real-World Violence: Rhetoric Versus Data“Contrary to the claims that violent video games are linked to aggressive assaults and homicides, no evidence was found to suggest that this medium was positively related to real-world violence in the United States. Unexpectedly, many of the results were suggestive of a decrease in violent crime in response to violent video games. Possible explanations for these unforeseen findings are discussed and researchers are cautioned about generalizing the results from laboratory and correlational studies to severe forms of violent behavior.” – h/t mugwump! who tweeted some of the tables here, here, and here.

The Objective Morality Delusion“Atheists often scorn those who believe in the God Delusion. The faithful, in turn, scorn those atheists who believe in the Objective Morality Delusion. The scorn is understandable in both cases, but I give the nod to the faithful on this one….” – from helian.

Paradox of nationalism“Nationalism as we know it arose in modern times in Europe. Other countries outside Europe just don’t seem to have the same thing, although there are exceptions, such as Japan, or maybe Turkey. And in fact, nationalism was at one time considered a part of liberalism – which is another European invention…. Other countries that don’t have the same history as Europe seem unlikely to develop that kind of nationalism. Think of Iraq, Syria, most African countries, even China: they are more given to clannishness than patriotism.” – from mr. mangan, esq.

Plant breeding, not working slaves harder, drove cotton efficiency gains in the US South – from pseudoerasmus.

Confusion Over the Biological Reality of the Human Races“[O]ne can see clearly why Wade’s argument is not racist: at the core of his argument is his claim that the tribalism of racial ethnocentrism belongs to an ancient stage of human evolution that has to be overcome to move into modern states and inclusive institutions (see Wade, 136, 173-82, 196-97).” – larry arnhart on A Troublesome Inheritance.

Yes, it’s official, men are from Mars and women from Venus, and here’s the science to prove it“In his fascinating new book the developmental biologist Lewis Wolpert argues that there is actually hard science behind many of our stereotypical gender roles.” – h/t claire lehmann!

The Woman’s Heart Attack“[M]en more typically have ‘crushing’ pain; women, nausea. That women are likelier to have early warning signs, such as unaccustomed fatigue or insomnia (unaccustomed: That’s the key word here). That we are likelier — this spooked me and kept me, for months, glued to calendars — to die within a year of a heart attack. That our symptoms can be so varied and nuanced that we feel no fear, seek no help, and possibly die — which may be why, although more men have heart attacks, a greater percentage of women die of them.”

The Evolution of Culturally-Variable Sex Differences: Men and Women Are Not Always Different, but When They Are…It Appears *Not* to Result from Patriarchy or Sex Role Socialization“[E]vidence is marshaled across 21 data sources that directly challenge this foundational assumption of social role theory. Empirically, sex differences in most psychological traits — in personality, sexuality, attitudes, emotions, behaviors, and cognitive abilities — are conspicuously *larger* in cultures with more egalitarian sex role socialization and greater sociopolitical gender equity. Even sex differences in many physical traits such as height, obesity, and blood pressure are larger in cultures with more egalitarian sex role socialization and greater sociopolitical gender equity.”

School Performance After Preterm Birth“An increased risk of poor school performance for children born preterm has been shown in many studies, but whether this increase is attributable to preterm birth per se or to other factors associated with preterm birth has not been resolved…. Preterm birth was strongly and negatively correlated with school performance. The distribution of school grades for children born at 31-33 weeks was on average 3.85 (95% confidence interval = -4.36 to -3.35) centiles lower than for children born at 40 weeks. For births at 22-24 weeks, the corresponding figure was -23.15 (-30.32 to -15.97). When taking confounders into account, the association remained. When restricting the analysis to siblings, however, the association between school performance and preterm birth after week 30 vanished completely, whereas it remained, less pronounced, for preterm birth before 30 weeks of gestation. Our study suggests that the association between school performance and preterm birth after 30 gestational weeks is attributable to factors other than preterm birth per se.”

Are Neighborhood Health Associations Causal? A 10-Year Prospective Cohort Study With Repeated Measurements – h/t amir sariaslan! who tweeted: “Neighborhoods did not cause health outcomes in Australian large longitudinal within-individual study over 10 years.”

Seat of Selflessness Found in Brains of Extreme Altruists“In this case researchers chose to study people who donated a kidney to a complete stranger. They found that not only are extreme altruists’ brains different from a normal person’s, they’re basically the opposite of a psychopath’s in one key way – indicating that a specific brain region may play an important role in people’s ability to care for one another.” – n=39, but it’s a start!

Can the Game of Thrones option save the UK?“The situation now resembles the Union of Crowns from 1603-1707 when Scotland had its own parliament but was still under the king in Westminster, and Cameron is behaving like Charles I: making promises to his northern kingdom that affect the southern one, without regards to how the southerners feel. Just as in 1640, the greatest protests are coming from the east of England, once the stronghold of Puritanism and the parliamentary rebels and now the Ukip heartland.” – from ed west.

God, Darwin and My College Biology Class“[A] third consequence of evolutionary insights: a powerful critique of theodicy, the scholarly effort to reconcile belief in an omnipresent, omni-benevolent God with the fact of unmerited suffering. Theological answers range from claiming that suffering provides the option of free will to announcing (as in the Book of Job) that God is so great and we so insignificant that we have no right to ask. But just a smidgen of biological insight makes it clear that, although the natural world can be marvelous, it is also filled with ethical horrors: predation, parasitism, fratricide, infanticide, disease, pain, old age and death — and that suffering (like joy) is built into the nature of things. The more we know of evolution, the more unavoidable is the conclusion that living things, including human beings, are produced by a natural, totally amoral process, with no indication of a benevolent, controlling creator.” – david barash, pessimist(?).

Incest a “fundamental right” says German committee says“Anti-incest laws in Germany could be scrapped after a government-backed group said relationships between brothers and sisters should be legal.” – those wacky germans! h/t anatoly!

Radicalised Muslims in UK more likely to be born in Britain, rich and depressed“Young British Muslims whose families have lived in the UK for generations are more at risk of radicalisation than recent migrants to Britain, according to new research which reveals the common characteristics of those most vulnerable to recruitment by terrorists.” – we’ve seen that pattern before. h/t ed west!

Millions of Old Tyres are Dumped Near Empty Apartment Blocks in Spanish Ghost Town – you HAVE to see the photos! h/t ian geldard!

bonus: Skin coloring of rhesus macaque monkeys linked to breeding success, new study shows

bonus bonus: Fantastically Wrong: Europe’s Insane History of Putting Animals on Trial and Executing Them – h/t kyle hill!

bonus bonus bonus: Belgium to build beer pipeline under Bruges – those wacky belgians!

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

(~_^)

princess leia and cersei

previously: lookin’ for love…

looking for love

i said:

“robin fox, for instance, in The Tribal Imagination (and, i suppose, in his incest book, but i haven’t read that) mentioned that, in father-daughter incest cases, the majority of those relationships are initiated by the daughter.”

redzengenoist asked for a reference, which then i couldn’t find — but now i found it! and it goes to show — you should always ask for a reference! from The Tribal Imagination [pg. 152]:

“In both stories the initiator is the girl, like Lot’s daughters. This is far from the ‘patriarchal’ situation usually envisaged with dominant males sexually exploiting helpless females, as Amnon and Tamar. The poet sees incest as a dangerous female impulse; the men are the horrified victimes. Ovid is almost Wahhabist in his fear of female lust. But this is in line with the fact that in cases of consummated incest the female often is the initiator, and with the classical and ancient world’s depiction of women (some women) as assertive, and as taking the initiative in matters sexual.”

obviously, “often” (what fox said) does not equal “the majority” (what i remembered).

boy, do i have a lousy memory! (*hbd chick blushes*) please, please, always ask me for a reference if i haven’t given one!

(note: comments do not require an email. can’t remember anything anymore….)

about the semai, i forgot to mention that, apart from conflict, they also don’t like competition in activities like sports — from wikipedia (see also Cooperation and competition in peaceful societies):

“The games Semai children play are non-competitive…. A game of badminton for example uses no partition nets and keeps no score. The shuttlecock is deliberately hit so that it could be easily intercepted by the other player and passed back, and so forth.”
_____

more on the clannish albanians:

“An Insider’s View of EU Efforts in Kosovo”
“‘We Have Achieved Almost Nothing’

“Since 2008, the EU has had thousands of soldiers, judges and prosecutors in Kosovo to help it become a Western-style constitutional democracy. But a German police officer with years of experience there says it is still dominated by corruption, clan loyalties and drugs — with officials just waiting for the high-minded reformers to leave….

“[A] recent report by the European Court of Auditors finds that there have been hardly any successes. It concludes that levels of organized crime and corruption remain high, while the judiciary is inefficient and suffers from too much political influence. A German police officer familiar with conditions in Kosovo for many years confirms the report’s findings based on his own experiences in the country….

“It’s my impression that corruption is quite high among Kosovar police officers. I was told that, if you’re caught with a stolen car, all you have to do is pay the officer a bribe to take care of the problem.

The major criminals are already out of reach, protected by traditional clan structures and the old-boys’ networks within the former Kosovo Liberation Army (KLA), from which many police officers were recruited….

Kosovo is a country in which centuries-old traditions live on, and blood feuds are part of the culture. We Central Europeans have not been able to convince the Kosovars of the benefits of adopting a new legal and value system like the one we have in the West. That’s because they see that the old structures remain powerful while government institutions are weak. I fear that the Kosovars will ride us out, just as the Taliban are waiting for Western troops to withdraw from Afghanistan….”
_____

the danes consider decriminalizing incest. danish geneticist points out that inbreeding can be a good or a bad thing:

“Aarhus siblings’ love child sets off incest debate”

“The recent case of a brother and sister in the city of Aarhus who said that they are in love and have a five-month-old child together has raised a national debate about sibling sex. The couple, who share the same father but have different mothers, face jail time for violating Denmark’s current statute prohibiting incest and inbreeding….

“The possibility of passing on genetic defects and damaging the social order have been the main reasons cited for making it illegal for siblings to have sex and produce offspring. But Niels Tommerup, a professor of genetics at the University of Copenhagen, said that mutations resulting from inbreeding can be both positive and negative.

“‘Our focus is always on the negative consequences like diseases and malformations,’ he told Information newspaper. ‘But positive mutations help develop the species.’

Tommerup said that mutations like those that occur due to inbreeding can be ‘biologically positive’.

“‘It is hard to imagine that there would be the formation of new species without some form of inbreeding,’ he said.

“Tommerup would not go as far as changing the law prohibiting sex between brother and sister, however. He recommended that family sex get no closer than cousins.

“He said that the famous Danish blue eyes are a mutation that could only have occurred via inbreeding sometime in history.

‘If inbreeding is banned, the possibility of promoting new, positive variants could be lost,’ he said.

“Vagn Greve, a law professor at Copenhagen Business School, would like to see even more taboos removed. Greve said there is ‘no logical reason’ that sex between parents and their children should be against the law.

“‘In my view, we should decriminalise sex between father and daughter as long as they are both adult and the relationship is voluntary,’ Greve told metroXpress newspaper. ‘There is no reason to treat the biological family different from the social family, but the age limit should be 18 or 20-years-old.’

Greve said that sex among immediate family members has been legal in countries like Spain, Italy, the Netherlands and France for 200 years, and that there is no evidence that it has damaged either families or society….

hmmmm….
_____

(note: comments do not require an email. yay, denmark!)

New genetic light shed on human evolution“A new genetic study of a group of sub-Saharan peoples has challenged the prevailing view that modern humans emerged from one location in Africa before spreading out across the world.” – see also Complex origins and natural selection of the Khoe-San from dienekes. and also African neighbours divided by their genes.

Out-of-Asia and Into-Africa (?)“[I]t is very likely that there was indeed such a migration into East Africa. What Pickrell et al. have added to our knowledge is that this migration is fairly recent.” – from dienekes.

Are We Really Getting Smarter? – from james flynn.

Neanderthals used feathers as ‘personal ornaments’

Are Neanderthals Human?

Genetic Obesity Risk Heightened by Sugary Drinks“[P]ersons with a greater genetic predisposition to obesity appeared to be more susceptible to the deleterious effects of sugar-sweetened beverages on BMI….”

speaking of fat: Human biodiversity in adiposity“[T]he manner in which fat is deposited in the body, e.g. viscerally vs. subcutaneously, as well as the amount of fat deposited, is substantially heritable, varies between races, and that variation may be due to differences in infectious disease risk over time periods long enough for natural selection to act.” – @the breviary.

Not Wanting Kids Is Entirely Normal – but won’t be selected for….

Why We Need to Study the Brain’s Evolution in Order to Understand the Modern Mind

Prehistoric Animated Cave Drawings Discovered In France – cool!

How to confuse a moral compass“Survey ‘magic trick’ causes attitude reversal.” – people are really retarded. (no offense to retarded people.)

Contestants Race to Map DNA of 100 Centenarians

The 10 best-educated countries in the world

bonus: Warp Drives Might Be More Realistic Than Thought – zooooooooom!

bonus bonus: Bird brains? Crows remember your face (and know you’re hiding in there)

bonus bonus bonus: Ohio woman who unknowingly married her father says learning the secret was ‘devastating’ – oops! (they didn’t have any kids.)

bonus bonus bonus bonus: How the Tabby Got Its Stripes: It’s in the Genes“Tabby cats get their stripes from two important genes, according to new research — the same genes that create a rare ‘king’ cheetah’s stripes. Cats with narrow stripes, the so-called ‘mackerel’ pattern, have a working copy of the gene. But if a mutation turns the gene off, the cat ends up with the blotchy ‘classic’ pattern.”

(note: comments do not require an email. mackerel tabby.)

heh. several of you were grossed out at the thought — and that’s good! that is as it should be.

i don’t have a brother, so i don’t know what the westermarck effect feels like, but apparently it feels like … ewwwwwwww! and it doesn’t just work for sibilings, but any kids that are raised together. i’ve read many accounts of muslim couples who have been made to marry their first-cousins who complain that they’re not attracted to each other and very often they were raised together (in an extended family household), so they feel like … ewwwwwwww!

robin fox had a lot of interesting stuff to say about the westermarck effect in “The Tribal Imagination” (chapter 6 — and also presumbaly in his book on incest, but i haven’t read that). here’s an excerpt for ya [pgs. 128-31]:

“Taboos on sexual relationship between close kin, between the members of the immediate family, were long thought to be a purely human invention. Animals, it was maintained, had no such inhibitions and mated incestuously. Thus the taboos on such animalistic behavior were thought to be the very foundation of human society; they were the ultimate Drumbeat of humanity, by which, in the immortal words of Levi-Strauss, culture said ‘No!’ to nature….

“The move from nature to culture represented by the imposition of the taboos was seen as precarious and counter to natural motives, which were ineradicable. In consequence, the taboos had to be stern and enforced by constant vigilance. In this traditional view, we all wanted to make love to our nearest kin, but once the momentous leap into culture had been taken, it would have been disastrous to go back into the maelstrom of incestuous animality. Our societies were built on the presumption of mating outside the family, it was the very definition of humanity itself, and so stern taboos, laws, and punishments were needed to keep incest at bay.

“This was a plausible view because societies did almost universally ban sex and marriage within the immediate family, and punishments for breaches of this rule were often severe, including torture and death. In their mythologies, primitive tribes and ancients societies often portrayed incest, and the results of it were usually disastrous. There were exceptions to the rule (and we shall return to these), but they were almost always royal exceptions, and royal persons, as gods on earth, were allowed behavior that was not allowed to ordinary mortals. On the whole, then it was agreed, there was a ‘grisly horror’ of incest (Freud) that universally afflicted people and led them to impose and enforce the taboos, often extending them beyond the family to members of the clan, variously defined. Why, the question went, would we have such strong taboos if we did not have the strong desire in the first place?

“Both popular opinion and the collective voice of the behavioral sciences echoed this orthodoxy. But there was always an undercurrent of skepticism. Why, the objectors asked in turn, do we seem, by and large, not to want to have sex with our closest relations? This would be the common-sense observation. Incest happens, but in proportion to non-incest, it does not happen very often. And most of this avoidance of incest does not seem to result from fear of punishment; there seems to be a genuine aversion to incest. This aversion seems to vary according to the relationship: strongest between mother and son, weakest between father and daughter, variable between brother and sister. But it is there, and usually only breaks down in unappetizing circumstances.

“The orthodox view said that left to our own devices we would immediately resort to incest and so we have to be reined in by strong taboos and sanctions…. The skeptical view says that, on the contrary, left to our own devices we would probably mostly avoid incest spontaneously. The orthodox view asks why, then, if this is so, are there the universal strong taboos?

“The skeptic answers that we often taboo the things that we are averse to, not because we secretly want to do them, but because we disapprove of people doing things that are generally obnoxious to us. We strongly taboo murder, not because we are all given to implacable murderous impulses, but because we are averse to it, so that even if only a few people do it, it offends us. We do, however, understand the temptation to do it; we have all perhaps felt it momentarily. So the subject fascinates us and permeates our legends and stories from the beginning. Sex and violence, incest and murder — often linked in our fantasy productions — persist in our imaginative attempts to interpret ourselves to ourselves….

“[I]n looking at animal behavior under natural conditions, indeed at the behavior of all sexually reproducing organisms, outbreeding seemed to be the rule and incest was rare. This was especially true in our primate relatives, and so by implication in our ancestors during the long haul through the savannas and the ice….

“The origin of this sexual reproduction is still a mystery, but whatever the reason, this new form of reproduction won out over its rival (which is still around) by virtue of its ability to produce instant genetic variability for natural selection to work on. Close inbreeding results in a loss of such variability, hence mechanisms evolved to avoid it. At the same time, if inbreeding becomes too random, then any beneficial genes will be dissipated rather than concentrated and preserved. It is this loss of variation that seems to be at the heart of sexual strategies, not the bad genetic effects of close inbreeding. In small bands these effects would quickly be bred out, and even scattered bouts of outbreeding would reestablish a healthy stock.

“So nature aims for a middle ground: organisms breed out to avoid losing variability, but not so far out that they dissipate genetic advantages. In human terms this means that the immediate family is taboo, but that marriage with cousins should be preferred. This is exactly what we find in human history until the dramatic growth and disruption of human populations upset the natural balance of the traditional society.”

actually, this is exactly what we find in human history until the roman catholic church started fiddling with mating patterns in europe in the early middle ages (see Inbreeding in Europe series down below ↓ in left-hand column).

“[I]f inbreeding becomes too random, then any beneficial genes will be dissipated rather than concentrated and preserved.”

think about that in terms of altruism genes.

(note: comments do not require an email. don’t panic!)

guy on reddit claims to have … well, uh … *ahem* … you know (*nudge, nudge, wink, wink*) … with his sister for well over ten years.

interesting read. but you never can be sure on the internet, can you?

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

Follow

Get every new post delivered to your Inbox.

Join 311 other followers