Archives for posts with tag: mexicans

oops! it happened again. =/

Deletion of Any Single Gene Provokes Mutations Elsewhere in the Genome“Johns Hopkins researchers report that the deletion of any single gene in yeast cells puts pressure on the organism’s genome to compensate, leading to a mutation in another gene…. ‘The deletion of any given gene usually results in one, or sometimes two, specific genes being “warped” in response….’”

Self-heal like Wolverine? Gene discovery might hold clues“In a discovery by a Harvard researcher, a reactivated gene found in embryos helps mice regrow clipped parts of their ears and toes. Could the ‘fountain of youth’ gene hold promise for humans too?” – i want one! – h/t mike anissimov!

Gene Variants Up CKD [chronic kidney disease] Risk in Blacks“A high-risk genetic variant conferred a significantly increased risk of progressive kidney disease in African Americans, at least partly explaining a racial disparity in end-stage renal disease (ESRD), investigators reported here. Analysis of black and white patients in another trial — half with diabetes — showed kidney function declined almost three times as fast in blacks with the high-risk APOL1 profile as compared with whites….”

Genetic clue to high heart risk of black Americans“The gene that produces the protein [PC-TP which activates a clotting factor called PAR4] is four times more active in the platelets of black Americans than it is in white Americans.” – h/t hbd bibliography!

Europeans and South Asians share by descent SLC24A5 light skin allele“‘We date the coalescence of the light skin associated allele at 22–28 KYA. Both our sequence and genome-wide genotype data confirm that this gene has been a target for positive selection among Europeans. However, the latter also shows additional evidence of selection in populations of the Middle East, Central Asia, Pakistan and North India but not in South India.’” – @dienekes’.

The ancestors with no descendants“On the eve of the last ice age, Siberia was home to a people who were related to modern Europeans and Amerindians but not to modern native Siberians. So concludes an analysis of DNA from the remains of a boy who lived 24,000 years ago at Mal’ta near Lake Baikal, Siberia…. [T]he Mal’ta people probably looked very much like native Indians with a more European skull shape, perhaps like the Ainu of northern Japan or the Kennewick humans of North America.”

Political colour is half genetic“New study provides definitive evidence that heritability plays a significant role in the formation of political ideology, regardless of how ideology is measured, the time period or population sampled.” – – the photo caption is pretty funny/telling: “Imagine if scientists could identify the ‘liberal’ genes and genetically modify babies so that they all voted liberal when they grow up? Brave new world?” (and the first comment is priceless!) – h/t ray sawhill!

It’s not just conservatives that support discrimination against their ideological foes“‘Discrimination by liberals has received scant attention in the literature, despite this being a prevalent concern in conservative rhetoric. By only examining conservative biases, social scientists fail to fully explore political intolerance in America. This research helps fill that gap….’ When opposing groups were seen as violating core values, liberals were just as likely to support discrimination against same-sex marriage opponents, religious fundamentalists, Tea Party protestors, and prolife people as were conservatives against feminists, atheists, leftist protestors, and prochoice people.”

Politics Has an Odor“[C]onservatives are significantly more likely than liberals to detect [bitter tasting] PTC [phenylthiocarbamide].” – h/t jayman!

Study: Your brain sees things you don’t“Our brains perceive objects in everyday life of which we may never be aware, a study finds, challenging currently accepted models about how the brain processes visual information.”

New evidence on the biological basis of highly impulsive and aggressive behaviors“Physical and chemical changes in the brain during development can potentially play a role in some delinquent and deviant behaviors.”

Root of maths genius sought“Entrepreneur’s ‘Project Einstein’ taps 400 top academics for their DNA.”

Has a 15-year-old explained the Flynn Effect? – on elijah amstrong and michael woodley’s newly published paper! – from steve sailer.

Is young Woodley down for the count? – never! (^_^) – from dr. james thompson.

Religions of the American Nations“[T]hese differences [regional cultural and political divisions in america] stem from the *genetic* differences in the descendants of these initial settlers (suffused with the genes of subsequent immigrants, particularly in the old North).” – from jayman.

In Hookups, Inequality Still Reigns“[A] study of 24,000 students at 21 colleges over five years found that about 40 percent of women had an orgasm during their last hookup involving intercourse, while 80 percent of men did.” – h/t john durant!

The Co-Villains Behind Obesity’s Rise“Not everyone, however, has the same gut bacteria. And, interestingly, the composition of this bacteria correlates with obesity…. [T]he bacteria study found that the ‘obese gut bacteria’ had an impact only when the mice were fed diets heavy in saturated fats.” – h/t jayman!

Rich Chinese Couples Turning To American Surrogates For Easier Immigration And ‘Designer Babies’“Another factor that has some Chinese couples choosing American surrogates is a desire for ‘designer babies.’ While most couples still use their own eggs and sperm, making the child biologically theirs, Reuters reports that more and more people are open to egg donation, to get what some clients believe are smarter and better-looking children. ‘Lots of clients that are Chinese do use tall, blond donors,’ Jennifer Garcia, who works at Extraordinary Conception in California, where 40 percent of clients are Chinese, said in the report.” – h/t mark krikorian!

CRISPR gene therapy: Scientists call for more public debate around breakthrough technique“‘I’m sure there will be some concern about the possibility that the technology could be used for “enhancement” rather than repair, veering from medicine towards eugenics,’ [professor wells] warned.” – oh noes! not “enhancement”! *swoon!* h/t anatoly!

Should state education be abolished?“New York City adopting Finland’s education system is not going to make New York like Finland…. In the game of life the dice are loaded and trying to make teachers responsible for making life fair is deluded and unfair to them….” – from ed west.

Shaker Heights – from greg cochran.

John Derbyshire’s Modest Proposal On Politics and Intelligence“And the too-dumb-to-vote segment is only a part of the problem we conservatives have with universal suffrage. Here’s another part: too *smart* to vote…. At the very highest levels of intelligence, the correlation between IQ and sensible political opinions may actually be *inverse*: the more brilliant you are, the dumber your politics. Albert Einstein thought well of Stalin; Hitlerism got its first mass following in the highly-selective German universities.”

Amid austerity and debt, Denmark remains happiest nation“The second pillar of happiness is a high level of trust between people, even for a stranger on the street….” – crazy danes! (~_^)

Introducing the Mongol Project“‘I will now tell you all about the Tartars and how they acquired their empire and spread throughout the world.’” – excellent! – from t.greer.

Early uses of chili peppers in Mexico“Chili peppers may have been used to make spicy beverages thousands of years ago in Mexico….”

Case of Insect Interruptus Yields a Rare Fossil Find“[T]he oldest fossil of two insects copulating.” – 165 million years old!

This Is How Much Money You’ll Make Based on Your Personality – d*mn. =/

bonus: Another Word for “Holocaust”“[O]ne would have to be smoking banana peels dipped in formaldehyde and sprinkled with PCP to assert that both events [the holocaust and the holodomor] receive a similar amount of attention in Western media and academia.” – from jim goad. of course.

bonus bonus: Swedish cinemas launch feminist movie rating – hahahahahaha!!! heh. wait. (*hbd chick wipes tears from eyes*) heh. – “To get an ‘A’ rating, a movie must pass the so-called Bechdel test, which means it must have at least two named female characters who talk to each other about something other than a man….” – hahahahahaha!! – “The entire ‘Lord of the Rings’ trilogy, all ‘Star Wars’ movies, ‘The Social Network,’ ‘Pulp Fiction’ and all but one of the ‘Harry Potter’ movies fail this test,” – so, except for The Social Network, all of my faves. this is going to be a REALLY handy movie rating system. whatever movies they FAIL, i will go see! (^_^)

bonus bonus bonus: Strange Doings on the Sun“Sunspots, Which Can Harm Electronics on Earth, Are Half the Number Expected” – ruh roh.

bonus bonus bonus bonus: Large magma reservoir gets bigger – ruh roh.

bonus bonus bonus bonus bonus: This amazing fruit fly evolved to have pictures of ants on its wings – srsly! – h/t jayman!

(note: comments do not require an email. rupee – first dog to climb mt. everest. woof!)

john derbyshire has a blog post up @vdare — Aztecs and Hidalgos: Are Upper-Class Hispanics Importing Their Own Peons? — in which he points out that an awful lot of the u.s.’s pro-amnesty leaders are (genuine) white-hispanics — in other words, they appear to be of mostly european extraction — while on the other hand the vast majority of immigrants we get from mexico are actually mestizos or indios — or, as john dubs them, “aztecs” (over which some ninnies have pointed and sputtered, apparently).

which got me to wondering — again — who are our mexicans? are they really the descendents of/partly descended from the aztecs or what? pre-columbian mexico was very multi-cultural (lucky them!), so which mexicans are actually coming to the u.s. these days?

i’m going to try to get at that by examining which regions of mexico our mexican immigrants come from. that, obviously, will just leave us with a guesstimate of which sub-groups of mexicans are coming to the u.s., but until we get full genomic sequencing done on all immigrants entering the country, it’s the best i can do. i don’t know from which parts of mexico immigrants in past decades hailed, so perhaps a lot of them were/are indeed of aztec descent, but thanks to the mexican government’s consejo nacional de población (conapo), we do know where our most recent mexican immigrants are coming from today (2010).

before i post a couple of neat maps from conapo, let me mention again a couple of facts that most you are probably already aware of: 1) most mexicans are mestizos, i.e. of mixed indio and european heritage, 2) most mexican mestizos are more indio than they are european, and 3) the further south you go in mexico, the more indio the mestizos are [pdf].

ok. a couple of maps taken from here (specifically here [pdf] — click on maps for LARGER views)…

grades of the intensity of emigration to the u.s. by federal district, 2010 [names of four hottest districts added by me]:

immigration from mexico by federal district - 2010b

and grades of the intensity of emigration to the u.s. by municipality, 2010:

immigration from mexico by municipality - 2010

as you can see on the first map, four federal districts in mexico have “muy alto” (very high) emigration to the u.s.: michoacán, zacatecas, guanajuato, and nayarit. michoacán is the furthest to the south with guanajuato following, so presumably the mestizos from these regions are more indio than those from the other two regions. judging by the map of immigration from municipalities, the greatest numbers of immigrants come from zacatecas and guanajuato.

so who are these people? who were their ancestors?

the zacatecos were one of the groups referred to by the aztecs as chichimecas or “barbarians.” i’m not sure whether or not they spoke a language related to aztec, or were related to the aztecs, but they certainly were not a part of the settled aztec civilization. the zacatecos were nomadic hunter-gatherers and were reportedly expert archers. these are some of the peoples who gave the spaniards a run for their money in the chichimeca war with their armor-piercing arrows. cool!

from Soldiers, Indians, and Silver: The Northward Advance of New Spain, 1550-1600 [pgs. 39, 46-48]:

“The Zacatecos, tribesmen closest to most of the new silver mines, were the fourth nation of this Gran Chichimeca. They overlapped the land of the Guachichiles east and north of Zacatecas; they extended westward to border on the Tepehuanes near Durango; and they roamed as far north as Cuencame and Parras, where they touched upon the Irritilas or Laguna tribes. The Zacatecos were mostly nomadic, although a few groups were essentially sedentary. They were brave and bellicose warriors and excellent marksmen. Some Spaniards called them the most valiant and warlike of all the Chichimecas. They were mightily feared by neighboring peoples, especially the Cazcanes, whom they attacked constantly — fifty Zacatecos were known to have successfully raided a Cazcan pueblo of as many as three or four thousand inhabitants….

“The general way of life throughout this Gran Chichimeca varied little from tribe to tribe and from nation to nation. Contemporary descriptions of the customs and characteristics of the Chichimecas seldom noted important variations between one grouping and another….

“In hand-to-hand combat, the Chichimeca warrior gained, among other Indians and Spaniards, a reputation for courage and ferocity…. In fighting other Indians (Mexicans, Tarascans, Cazcanes), part of his courage could be accounted for by the contempt he felt for the tribes that had adopted the ways of the white man. And, as already implied, the Chichimeca came to have a lesser respect for the Spaniard himself as the Indian raids went unpunished….

“[H]is contact with Spanish military practice also led the Chichimeca to take more practical measures to assure success in fighting. He sent spies into Spanish-Indian towns for appraisal of the enemy’s plans and strength; he developed a far-flung system of lookouts and scouts (*atalayas*); and, in major attacks, settlements were softened by preliminary and apparently systematic killing and stealing of horses and other livestock, this being an attempt, sometimes successful, to change his intended victim from horseman to foot soldier.

“When the Chichimeca was attacked in his mountainous or other naturally protected stronghold or hideout, he usually put up vigorous resistance, especially if unable to escape onslaught. In such cases he fought — with arrows, clubs, or even rocks — behind natural barriers (or in caves) that had sometimes been made stronger by his own hands and ingenuity. Even the women might take up the fight, using the weapons of fallen braves….

“The high degree of Chichimeca accuracy with bow and arrow called forth much respectful and awed comment from his Spanish enemy. ‘On one occasion I saw them throw an orange into the air, and they shot into it so many arrows that, having held it in the air for much time, it finally fell in minute pieces.’ ‘In the opinion of men experienced in foreign lands, the Zacatecos are the best archers in the world.’ ‘They kill hares which, even though running, they pierce with arrows; also deer, birds, and other little animals of the land, not even overlooking rats … and they fish with the bow and arrow.’ Children of the Chichimecas were taught the use of the bow from the time they could walk, and they practiced by shooting at insects and the smallest animals.

“The forces and penetrating power of the Chichimeca arrow was always a puzzle to Spaniards, particularly in view of the extreme thinness of the arrow shaft. ‘It has happened that, in a fight between some soldiers, and some Chichimeca Indians, an arrow hit one soldier’s powder flask [of wood, usually], passed completely through it, then penetrated his armor, consisting of eleven thicknesses of buckskin (*gamuza*), a coat of mail, a doublet, and the soldier was wounded by said arrow.’ ‘It has happened that an arrow hit a horse on which a soldier was fighting and the arrow passed through the horse’s crownpiece (which consisted of a very strong leather and metal piece), his head, and came out through the neck and entered the chest, a thing which, if were not known to be certain, seems incredible.’ ‘One of don Alonso de Castilla’s soldiers had an arrow pass through the head of his horse, including a crownpiece of doubled buckskin and metal, and into his chest, so he fell with the horse dead on the ground — this was seen by many who are still living.’

“The Chichimeca bow was about two-thirds as long as the average body, reaching approximately from head to knee; it was probably made of such materials as cottonwood, willow, mesquite, *bois d’arc*, or juniper — woods that could be found in the area. The arrow, about two-thirds as long as the bow, was very thin, usually made of reed and usually with an obsidian tip, which was fastened to the shaft by human sinews or animal tendons. Shortness of bow, thinness of arrow, and the conchoidal edge of the obsidian combined to achieve a penetration the Spaniards could hardly believe. The fact that the Chichimeca arrow found its way through all but the closest-woven mail was a factor in the increasing Spanish use of buckskin armor on this frontier.”

iwitbb**: “Mexico’s National Population Council estimates that 600,000 natives of Zacatecas now live in the United States, a figure that is equivalent to 40 percent of the state’s resident population of 1.5 million. If the base population is supplemented by the number of children and grandchildren who have been born in the United States, the total number of Mexicans and Mexican Americans of ‘zacatecano’ origin living in the United States exceeds the number of people who reside in the state.”

so we’re not short of people from zacatecas.

most of the peoples of guanajuato were also some of these nomadic chichimeca folks. a lot of them were guamares, but the zacatecos were also present along with other hunter-gatherer chichimeca groups. like zacatecas, guanajuato was never a part of the aztec empire either. nor was it a part of another neighboring empire, the tarascan state which was run by the purépecha people (see section on michoacán below), although the areas of guanajuato that were adjacent to the tarascan state were influenced culturally by that state.

so the probable ancestors of many of the people from the two mexican regions from which the u.s. today receives the most migrants were nomadic hunter-gatherers with a warrior streak. right up until 1590 (the end of the chichimeca war), or just ca. 20 generations ago (counting a generation as roughly 20 years).

[edit: see also this comment.]

the pre-columbian michoacán area was inhabited by several different groups, but the ones that really left their mark were the purépecha people with their tarascan state. they were never conquered by the aztecs, and they built a really neat city of their own — tzintzuntzan — replete with some of those very fashionable (back in the day) latin american pyramids. interestingly, the purépecha language is not related to any of the neighboring languages of the region.

from Prehistoric Mesoamerica [pgs. 324-325, 329]:

“The Tarascan state occupied about 65,000 square kilometers (25,000 square miles) and included within its boundaries various ethnic and linguistic groups. Thus, it fulfills the formal qualifications required of an imperial system. The ‘Relacion de Michoacan’ relates that the Tarascans were ruled by a priest-king-god who governed a large political unit. In terms of area, it seems to have been the largest political unit in Mesoamerica at the time of the Spanish Conquest. The empire was administered by a wide variety of officials who handled matters such as taxes and censuses.

“Although 340 settlements are mentioned by the ‘Relacion de Michoacan’, only four of them qualified as cities, and they were located within the Lako Patzcuaro basin. The largest was the capital of Tzintzuntzan, which had been founded about A.D. 1000 as a center for the worship of two important deities. By 1350, the center had been transformed into an urban area sprawling along the lake shore, with a population of between twenty-five thousand and thirty-five thousand people. Archaeological survey has detected four districts that are the probable residence zones for four classes: upper and lower elite, commoners, and ethnic foreigners. Wards (barrios) for the various social and occupation groups survived in modern Tzintzuntzan into the twentieth century….

“The settlement pattern of the Tarascans was essentially rural, however, and most people lived in hamlets, villages, and towns….

“War was waged after the harvest was in, in good Mesoamerican manner. Spies (perhaps *pochtecas*) were employed for intelligence purposes. The Tarascans resisted the Aztec with a chain of fortified cities and with a professional army.”

so a more civilized group of peoples down in michoacán.

i didn’t have as much luck in finding out about the historic population(s) of nayarit — there doesn’t seem to be much info out there — not in english anyway. some nahua peoples (the aztecs are a nahua people) were there at some point and apparently built one small-sized city anyway. according to the wikipedia page for nayarit in spanish, the majority of the populace in nayarit today are the huichol people followed by the cora and also some nahual folks.

the huichol:

“…usually marry between the ages of fourteen and seventeen. Extended Huichol families live together in rancho settlements. These small communities consist of individual houses which belong to a nuclear family. Each settlement has a communal kitchen and the family shrine, called a xiriki, which is dedicated to the ancestors of the rancho. The buildings surround a central patio. The individual houses are traditionally built of stone or adobe with grass-thatched roofs.

“A district of related ranchos is known as a temple district. Temple districts are all members of a larger community district. Each community district is ruled by a council of kawiterutsixi, elder men who are usually also shamans.”


even more cool, re. the cora people:

“In the early 18th century they were an anomaly in that they had never permitted Catholic missionaries to live in their country. They had become a pagan island in a sea of Christian Indians and Hispanic culture. In 1716, a Spanish expedition to attempt to bring the Cora under Spanish control failed. However, in 1722, the Spanish returned in force and the Cora yielded. According to Spanish accounts many of them became Christian and practice, up until the present, ‘Catholic-derived customs.’”

so the descendents of some or all of these groups probably represent a large segment of mexicans coming to the u.s. right now.

what i think we should be asking ourselves — apart from why?? — is what are these different mexicans likely to be like given their (natural) histories? we’ve got a mix of peoples here ranging from the descendents of nomadic hunter-gatherer warriors to currently settled but isolated indios to the descendents of more civilized agricultural populations. so what sorts of selection pressures were the ancestors of all these mexican groups under for, say, the last one to two thousand years? what sorts of mating patterns/family types/social structures did these peoples’ ancestors have that might’ve affected the selection pressures on those populations?

who are our mexicans?

**iwitbb = if wikipedia is to be believed.

(note: comments do not require an email. huichol lady.)

**update: correction to post (about halfway down) – see also comments. thanks, matt!

check this out! [some excerpts from the paper]:

“A slow life history is related to a negative attitude towards cousin marriages: A study in three ethnic groups in Mexico”

“The sample consisted of 205 respondents from three rural ethnic groups. Half of the sample (51%, n = 103) were indigenous Mixtecs, 17% (n = 35) were Blacks, and 32% (n = 65) were Mestizos (for two participants the ethnic background was unknown). A large majority (94%) was Roman Catholic. There were about equal numbers of males (n= 100), and females (n= 105), and the sexes were nearly equally distributed over the three ethnic groups. The mean age in the sample was for women M = 44.79 (SD = 8.09), and for men = 49.85 (SD = 9.91). For the following percentages, because of rounding off and missing values, the total percentage is sometimes different from 100%. Most women (90%) were homemakers, 5% had a profession, and 6% indicated not to have a profession. Of the men, the large majority (74%) were farmers, 10% were fishermen, 16% had a variety of other professions, and 2% indicated to have no profession….

“The questionnaire consisted of 9 items, 4 of which expressed a negative, and 5 of which expressed a positive consequence of marrying a cousin. At the beginning of the questionnaire, participants were presented with the statement ‘Marrying a cousin….’ Then the 9 items followed. The five positive statements included 1) means that you marry someone with the same values; 2) enhances the unity in the family; 3) keeps wealth in the family; 4) makes it easier to get along with your spouse; 5) makes your marriage more stable. The four negative statements included: 1) may lead to children having a high risk of defects; 2) is wrong for religious reasons; 4) leads to family conflict; 5) leads to a relationship without passion. Participants were asked to indicate on a scale from 1 (extremely disagree) to 5 (extremely agree) how much they were in agreement with the 9 statements….

life history and cousin marriage - table 01

“A closer look at the participants’ ratings of the statements (Table 1) reveals that participants reported to be in the least agreement with most positive statements; on average, they disagreed that marrying a cousin would enhance the unity in the family, would keep wealth in the family, or would make it easier to get along with one’s spouse. On average, participants were neutral with respect to the statement that marrying a cousin would mean that you would marry someone with the same values. They were on average most, and very much, in agreement with the statement that marrying a cousin is wrong for religious reasons, nearly as much with the statement that marrying a cousin leads to family conflict, and somewhat less with the statement that marrying a cousin would lead to relationship without passion. It is noteworthy that the notion that a marriage with a cousin would result in children with a higher risk of mental and physical defects was considered relatively unimportant….

Overall, as predicted, with increasing levels of a slow life history strategy, the attitude towards marrying a cousin was more negative, β = -.30, t (189) = 4.24, p <.001. Separate analyses within the three ethnic groups showed that this was especially true for the Mixtecs, β = -.30, t (95) = 3.14, p = .002, and the Blacks, β = -.35, t (29) = 4.30, p < .001, but not at all for the Mestizos, β = -.07, t (59) = .57, p = .57….

The results demonstrate that participants overall had a negative attitude to marrying a cousin, and that the three ethnic groups did not differ in this respect. Unlike what is often assumed, the main objection against marrying a cousin was that it is wrong for religious reasons, and the risk of genetic defects of children born out of such marriages was considered relatively unimportant. In line with this, we found that, albeit only among men, marrying a cousin was viewed more negatively the more religious one was. Cousin marriage was neither considered to contribute to the quality or unity of marriage and the family. These findings may suggest that the attitudes towards such marriages differ from those in Western cultures where especially the risk of genetic defects of offspring is considered important (Ottenheimer, 1996), as well as from those in Eastern populations where cousin marriages are considered to preserve the unity of the clan and the family (cf. Jaber et al., 1996). Furthermore, as predicted, we found a sex difference with women having overall a considerably more negative attitude towards cousin marriage than men. This is in line with parental investment theory (Trivers, 1972). Since females invest the most in conception, birth and postnatal care, investing in a potentially unviable offspring is extremely costly. Therefore, women may be more concerned that marrying a cousin leads to children that have a higher risk of being mentally and physically handicapped….

Our findings clearly suggest that especially in this population, more negative attitudes towards cousin marriages do reflect primarily a slow life history strategy, characterized by typical features such as good executive functions, positive relationships with one’s parents, low mating effort, lower levels of risk taking, higher levels of foresight and planning, and more persistence and self-directedness. Individuals with this type of strategy do seem to be relatively less inclined to run the risk of having offspring with genetic defects because of mating with kin. From a theoretical point of view this slow life history strategy maximizes long-term reproductive success (e.g., Figueredo et al., 2006; Kaplan and Gangestad, 2005) by having fewer, high quality, offspring rather than having numerous lesser quality offspring, whose reproductive success depends more on luck….

“While we did not find differences between the ethnic groups in their attitudes towards cousin marriage, the effect of life history strategy was not only apparent among the Mixtecs, but also among the Blacks. However, it was not found among the Mestizos….

An additional finding was that, overall, those who approved of controlling the mate choice of their offspring had a more positive, or less negative, attitude towards cousin marriage. This suggests that, as expected, in general, fostering marriages with cousins may be the ultimate consequence of the preference to control the mate choice of one’s offspring by selecting in-group members as mates for one´s offspring. Indeed, a plethora of studies shows that in a wide variety of cultures, a major concern of parents is that the mate of their offspring comes from the same group (e.g., Buunk et al., 2008). A prime example of this are the various Islamic cultures such as Iran and Saudi Arabia where parents determine to an important extent whom their offspring marries, and where cousin marriages are very common (Jaber et al., 1996). One of the benefits of having one’s offspring marry a cousin is that family and clan alliances are strengthened, and loyalty from one’s son and daughter-in-law better safeguarded.”

so, buunk and hoben seem to have found that:

- individuals with slow life histories (the individuals formerly known as the K-selection people) tend to avoid cousin marriage whereas those with fast life histories (or the r-selection people) really don’t care one way or the other
- women want to avoid cousin marriage more than men (at least in mexico)
- mixtecs and blacks (slow life history) mestizos in mexico are less squeamish about cousin marriage than mestizos (slow life history) mixtecs and blacks
- all three of these groups generally avoid cousin marriage on religious grounds (the vast majority being roman catholic).


nowadays, the cousin marriage rates in mexico are very low — last time anybody checked (in the 1960s) the average rate across the country was 1.3% [pdf]. that’s loooow.

i haven’t yet looked much into the histories of mating patterns in mexico — and i haven’t looked at all at the mixtecs — mostly the mayans (see here and here for example). but if the mixtecs were anything like other pre-columbian, pre-christian latin american populations — the mayans or the aztecs or the taino in the caribbean — then they probably favored some sort of cousin marriage. i don’t know that for sure or not — i’ll let you know if and when i find out.

in fact, it’s likely that the roman catholic church dropped the prohibitions against cousin marriage beyond the first cousin limit for mexicans as early as 1537, which is ca. 400 years before the cousin marriage ban went to only first cousins for europeans. (i still have to check if this 1537 change was just for south americans or for all of latin america.) if this is correct, then mexicans have really only experienced a first cousin marriage ban since they converted to christianity in the 1500s+, rather than the second, third, and even sixth cousin marriage bans that europeans were subjected to starting in the 500s (or ca. 800s in more northerly parts of europe … or post ca. 1500 if you’re irish (~_^) ). in other words, europeans have probably been outbreeding more and for a longer period of time than most mexicans.

i’m not sure when mexicans started taking the church’s cousin marriage ban seriously. they had a habit of marrying very locally (i.e. in the barrio) right up until at least the 1950s (see here), so that could, of course, mean that they were marrying second and third cousins, etc., at least up until that point. mayan villages are typified by lattice networks of genetic connections between their residents — i don’t know if this applies to the mixtecs (or any other sub-populations of mexicans) as well, but i wouldn’t be surprised if it does.

buunk and hoben say: “Unlike what is often assumed, the main objection against marrying a cousin was that it is wrong for religious reasons, and the risk of genetic defects of children born out of such marriages was considered relatively unimportant…. These findings may suggest that the attitudes towards such marriages differ from those in Western cultures where especially the risk of genetic defects of offspring is considered important (Ottenheimer, 1996)….”

yes, buuuut — if you go back just two hundred years in europe, the reasons westerners avoided cousin marriage were almost purely religious. definitely if you go back to the medieval period. almost the entire reason for all of the outbreeding in the west is related to religious belief (conversion to christianity), although the secular powers that be also got involved. the concern about genetic/health defects really only started in darwin’s time (having said that, at least some people in late antiquity were aware of the health effects of too much inbreeding, too). so these differences are really just historic ones. westerners used to avoid cousin marriage for religious reasons, but now for many there’s just an automatic ewwww reaction, so official cousin marriage bans are almost not needed any longer.

this is some really neat research and a very cool paper! (^_^)

the only criticism i can level at the researchers is their apparent lack of awareness of the history of mating patterns in europe (don’t they read this blog?! (~_^) ). for instance, they said in the paper:

“For example, according to Kuper (2002), marriage between cousins was permitted in ancient Israel and was practiced in classic Greece and Rome. Although in the 4th century, Emperor Theodosius I introduced a ban on marriage between cousins, this practice continued and among the people attitudes were generally more or less neutral. Much more recently, in the 18th and 19th century in England, cousin marriages became increasingly accepted in especially the higher classes. Up until the middle of the 19th century, cousin marriage was permitted in the United States, and in many European countries. However, since the 19th century attitudes towards cousin marriage in the Western world began to change drastically. The main reason for this was that the progeny of cousins were believed to be inflicted with genetic defects and poor breeding, resulted in delays in progress within society (see e.g., Bittles and Neel, 1994).”

uh … no. they need to have a look at a couple of sources like goody or mitterauer or ausenda. or the “mating patterns in europe series” below ↓ in the left-hand column. (~_^)

bonus: anonymous conservative has written a lot about r/K selection theory wrt politics — make sure to check out his website!

previously: mating patterns in colonial mexico: the mayans and mating patterns in colonial mexico: yucatec maya population size and structural endogamy and assimliation is a two-way street (or why endogamy means mexicans will find it hard to become middle-class anglos)

(note: comments do not require an email. i’m a lumberjack, and i’m ok!)

Mental Health Diagnoses and Recidivism in Paroled Offenders“Offenders with borderline personality disorder and attention deficit hyperactivity disorder were significantly more likely to recidivate or be suspended.”

Psychopathic Traits Seen in Children’s Brains“Children with severe behavioral problems have a suppressed response to others’ pain, according to new brain-scan research.”

Cultural modernity and behavioral modernity“Some societies have gone farther than others along the trajectory that leads to cultural modernity and, in time, behavioral modernity.” – another great post from peter frost! (he forgot to mention the likely effects of mating patterns on societies, but that’s ok. (~_^) )

The Split Personality of America“The 20 states scoring highest on Neuroticism are all bordering to the [mississippi] river or east of it. Of the 20 states that score the lowest on this trait, 16 are in the western region – including all of the bottom 10.” – nice post from staffan!

Obesity and IQ and IQ and Death – from jayman.

Music and class – from the awesome epigone.

HVGIQ: Bermuda – from jason malloy @human varieties.

Disputed Results a Fresh Blow for Social Psychology“Failure to replicate intelligence-priming effects ignites row in research community”

and speaking of frauds: Symmetry study deemed a fraud“University finds evidence of fakery in Jamaican dance data.”

Modern European ADMIXTURE components = Neolithic ecological zones (+ post-Neolithic in-situ expansions)The revenge of the hunter-gatherer genes! – @eurogenes, via charles.

Monkey math“Zoo baboons shed light on the brain’s ability to understand numbers.”

Small-bodied humans from the Terminal Pleistocene in Tanzania – @dienekes.

“Selfish Spermatogonial Selection”: A Novel Mechanism for the Association Between Advanced Paternal Age and Neurodevelopmental Disorders

Older U.S.-born Mexican-Americans have more physical limitations than Mexican American immigrants: Study

Study: How Yoga Alters Genes – not genes, but gene expression.

bonus: Suicide rate up sharply“‘The suicide rate among middle-aged Americans climbed a startling 28 percent in a decade, a period that included the recession and the mortgage crisis, the government reported Thursday. The trend was most pronounced among white men and women in that age group.’” – from mr. mangan.

bonus bonus: Path From ‘Social Butterfly’ to Boston Suspect’s Widow – the elder tsarnaev’s wife was caught shoplifting once (before she ever met him). men always marry their mothers! (~_^)

bonus bonus bonus: If American Guns Wrecking Mexico Why Not Canada? – excellent question from parapundit.

bonus bonus bonus bonus: “Everything You Have Learned in School is Wrong” – nightmare immigration stories from norway @gates of vienna. don’t miss the follow-up.

bonus bonus bonus bonus bonus: Skeleton of teenage girl confirms cannibalism at Jamestown colony

bonus bonus bonus bonus bonus bonus: A 17th-Century Russian Community Living in 21st-Century Alaska“This clan has traveled from Russia through China, Brazil, and Oregon to make a home in the remote north, struggling to avoid modernization.”

bonus bonus bonus bonus bonus bonus bonus: Vatican uncovers ‘first Western painting of Native Americans’“They have remained hidden for more than five centuries, but tiny figures of naked men wearing feathered head-dresses could be the first Western depiction of Native Americans, the Vatican claims.”

bonus bonus bonus bonus bonus bonus bonus bonus: Rolling fistfight erupts in Venezuelan parliament over disputed election – i love fights in parliaments. (~_^)

bonus bonus bonus bonus bonus bonus bonus bonus bonus: New Study Finds Nothing That Will Actually Convince You To Change Your Lifestyle So Just Forget It

(note: comments do not require an email. taiwan parliament fight.)

for those of us who prefer to think about things in pictures/drawings/pie charts/hieroglypics rather than numbers (*hbd chick frantically raises her hand in the back of the classroom*), anonymous commenter pointed out this wikipedia page on structural endogamy to me (thanks, anonymous commenter! (^_^) ).

here, at long last, are a bunch of people diagramming mating patterns. ACTUAL mating patterns from real world examples. in detail.

below, for instance, are what the mating patterns — and the resultant connections between the members of the group — in a turkish nomadic clan look like (i haven’t read about this specific example yet, but i’m going to assume that this diagram represents a case of regular preferred father’s brother’s daughter’s [fbd] marriage since that’s pretty common amongst turkish nomadic clans):

structural endogamy - turkish nomad clan

the nodes that you see there, i.e. the colored dots, are married couples, not individuals. as you can see, this is a very tightly related clan with nearly everyone being connected somehow to the two founding couples. there’s a tight “core” to this clan, but it does expand in later generations simply due to the increase in the number of its members.

here’s a more detailed diagram of what i think must be the same turkish clan:

structural endogamy - turkish nomad clan 02

yeah. complicated!

and here’s a different mating pattern altogether mapped out. this is from a mexican village in which anything closer than, and including, marriage to a second cousin was not allowed (sounds like the influence of christianity to me, but i could be wrong about that), however marriage within the village was preferred (the village was studied in the late 1970s and the authors describe it as having been in a transitional phase in between a traditional nahuatl way of life and a more modern mestizo stage):

structural endogamy - belen mexico

as you can see, everyone’s still connected since most people married within the village, but the relationships are not as close as in the more closely inbreeding turkish clan. neat!

i’m sure i’ll be looking further into this structural endogamy or (marital) relinking as it’s also sometimes called. there’s even a whole book on the subject!

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

i thought i’d dip into the world values survey again to see what mexicans think/feel about certain behavioral norms/illegal activities in society as compared to americans (both white and black).

we’ve seen before that mexicans of all colors are less civic-minded than white americans, and that mexicans are more extended-family oriented than white americans (see also here). but what do mexicans think about the breaking of certain laws in society? how justifiable do they feel certain actions might be?

i looked at the world values survey 2005 and 2006 for the u.s. and mexico (you can read all about the two surveys in the technical reports here — they appear to be sound surveys to me). what i looked at were four of the “justifiable” questions:

Please tell me for each of the following statements whether you think it can always be justified, never be justified, or something in between [on a scale from 1 to 10, never to always]:

- Claiming government benefits to which you are not entitled.
- Avoiding a fare on public transport.
- Cheating on taxes if you have a chance.
- Someone accepting a bribe in the course of their duties.

here are the results of those who answered “Never justifiable” by sub-population for each of the questions. moreno oscuro=dark mestizo, moreno claro=light mestizo. i left out the indigenous group in mexico because the sample size was too small. the sample sizes are n=ca. 130-830.

- Claiming government benefits to which you are not entitled. – Never justifiable.

wvs - 2005 2006 - mexico & u.s. - justifiable - government benefits

so only ca. 30-40% of mexicans (depending on their skin color) think that claiming gov’t benefits to which one is not entitled is never justifiable. otoh, nearly 70% of white americans think such a behavior is never justifiable.

- Avoiding a fare on public transport. – Never justifiable.

wvs - 2005 2006 - mexico & u.s. - justifiable - avoiding fare

again, a ten to twenty point difference between the various mexican sub-groups and white americans.

- Cheating on taxes if you have a chance. – Never justfiable.

wvs - 2005 2006 - mexico & u.s. - justifiable - cheating on taxes

the ranges are closer wrt cheating on taxes, but still, more white americans feel it’s never justifiable than these three various groups of mexicans.

- Someone accepting a bribe in the course of their duties. – Never justifiable.

wvs - 2005 2006 - mexico & u.s. - justifiable - accepting a bribe

again, at least a ten, if not twenty, point spread between when it comes to thinking bribe taking can be justifiable.

it seems, then, that most mexicans — from white mexicans to dark-skinned mestizos (don’t know about the purely indigenous groups) — more ofen than white americans, feel that various types of cheating in society can be justified to some degree or another.

previously: civicness in mexico and familism in the u.s. of a. and anglo-american vs. mexican family values and hispanic family values

(note: comments do not require an email. likelihood of bribing mexican traffic police.)

vasilis asked a good set of questions the other day:

“I wonder, doesn’t immigration break apart the extended family into nuclear family fragments? Does anyone actually bring along all 52 first cousins with them, along with spouses, children, parents etc? Of course ‘familismo’ values will be carried over the border, but to what degree can they be instilled in the next generation in the absence of all these people in their daily lives?”

now that i’ve thought about it a bit, though, i wonder if the picture he paints isn’t one that was more true of 20+ years ago than it is today in our über-connected world. i mean, i can follow in real time how my 12 year-old first cousin-once-removed’s gymnastics competition is going — or commiserate with her on how horrible her school lunch was today — and she lives in a different country! i can keep in touch with her and her brother and all my other cousins’ kids in a way i couldn’t do with their parents. back in the day, it was the odd phone call and even (omg) letters. now it’s email, facebook and txt messaging. instant gratification for the familist! (~_^)

and anyway, we’ve seen that both italian-americans and r.c. irish-americans are more familistic than anglo-americans, and … how long have they been in the country now? how long does this assimilation business take anyway?

assmiliation? pshaw. here from “Who is to blame for fractured Britain?” published last year in the telegraph:

“What ruined our community and the personality of our neighbourhood were the young Eastern Europeans who poured in from 2004 onwards. I am not criticising the character of these young migrants. They were generally hardworking, eager and ambitious. But they arrived all at once in large numbers and, most significantly, had zero interest in integrating. They lived and socialised exclusively together, watched Polish television channels via their satellite dishes, chatted to family back home for free on Skype, set up Polish shops to sell Polish food, newspapers and books, and they learnt only as much English as they had to. Seeing shop after little shop put up the words Polski sklep marked the end of the village I knew.”

mexicans in the u.s. don’t even need satellite television. they’ve got univision which is available on cable. any idiota can hook it up. i don’t know how much mexicans/hispanics in the u.s. use facebook, or if they’re all still on myspace, but they’ve (nearly) all got cellphones afaict and, i’m sure, can txt pretty easily to family members back home in mexico/wherever.

nope. i have a bad feeling that modern communications — not to mention the ease of travel nowadays — prolly lends itself to greater opportunities for immigrants to practice familism if they want than ever before. i know i can.

previously: hispanic family values and anglo-american vs. mexican family values and familism in the u.s. of a.

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

one of the ways to measure familism — behavioral familism (familism “expressed in everyday actions, or major decisions, informed by one’s attachment to family ties”) — is to find out how much contact the individuals in a given population have with their various family members: brothers, sisters, aunt, uncles, cousins, etc.

so i checked out the 2002 general social survey in which they asked questions like…

how often do you contact your cousin?”

…for the results for people whose family origins came from england or wales (“anglo-americans”) and from mexico. (i dunno how “anglo” some people from wales are, but what can an hbd chick do? gotta work with the data available.) obviously there’s no time depth here: the people with family origins from england — well, their families might’ve come over on the mayflower, or the gss people could’ve been interviewing the derb for all i know! same goes for the mexicans — could be recent immigrants, or fourth generation mexican-americans in new mexico.

unfortunately, the sample sizes for mexicans are on the small side — n=27-32 — so … grain of salt! the numbers for anglo-americans are better: n=80-96. here are the results (blue=anglos, orange=mexicans — click on charts for LARGER views):

Consider your favorite brother or sister – how often do you visit this brother or sister?

on the whole, mexicans are more likely to have more frequent person-to-person contact with their favorite sibling than anglo-americans, although the “daily” score is pretty close. no anglo-americans said that they lived with their favorite sibling, whereas 10% of mexicans in the u.s. said so.

Consider your favorite brother or sister – how often do you contact this brother or sister via telephone or letter? (remember: this is 2002.)

again, the general pattern seems to be more frequent telephone calls/correspondence between mexicans and their favorite sibling than with anglo-americans and theirs. twice as many mexicans responded “less often” than anglo-americans, but maybe ’cause that’s ’cause they actually see their favorite sibling so often. -?-

this pattern of mexicans having more contact with their family members than anglos becomes more pronounced/clearer to see with the more distant family members…

“How often do you contact your uncles/aunts?”

“How often do you contact your nieces/nephews?”

“How often do you contact your cousin(s)?”

now i’m curious to check out other ethnic groups…. (^_^)

previously: hispanic family values

(note: comments do not require an email. my favorite mexican.)


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