jewish inbreeding

an israeli water engineer writes: “Consanguineous marriage is almost unknown among Israeli Jews but prevalent among Palestinians.”

that’s probably pretty correct re. ashkenazi israeli jews, but i’m not so sure about other jews in israel.

i couldn’t find any recent data, but consang.net has the data from two studies on inbreeding amongst israeli jews, one from the mid-50s and one from the late-60s.

in the mid-50s, 1.4% of ashkenazis were married to either a first-cousin or were part of an uncle-niece marriage. on the other hand, 8.8% of sephardi jews were married to a first-cousin or were in an uncle-niece marriage.

then, in the late-60s, a study done in Petah Tiqwa found that 1.3% of ashkenazis were in a consanguineous marriage, while 14.3% of non-ashkenazi jews were in a consanguineous marriage.

unfortunately, no idea what the israeli rates for more recent years might be.

a study published in 1991 (also on consang.net) found that jews living in iran had a whopping 25.4% consanguinity rate. they’ve got first- and second-cousin plus uncle-niece marriages. so, look out israelis if you’ve got a lot of immigration from iran!

of course, jews have long been very endogamous. a study published last year looking at the genetics of different jewish populations found that:

“Individuals within each Jewish group had high levels of IBD [identical by descent], roughly equivalent to that of fourth or fifth cousins.”

so, ashkenazis are all related to each other like they are fourth or fifth cousins, iranian jews are all related to each other like they are fourth or fifth cousins, italian jews are all related to each other like they are fourth or fifth cousins, and so on. (comparable to icelanders.)

i would also guess that orthodox jews who observe all those tzniut laws are more inbred than other jewish groups. my favorite, the sheitel, is obviously a direct parallel to the muslim hijab, a practice which exists because of inbreeding. those jews, like so many muslims, must also be practicing some form of patrilineal marriage like fbd marriage.

an israeli water engineer also writes: “Consanguinity certainly increases defectous individuals but provides social stability and a sense of security.”

yes. one study from iceland showed that the sweet spot** re. cousin-marriage and fertility is third cousins, i.e. marry your third cousin to have the most offspring.

similarly, i think there must be a sweet spot re. cousin-marriage| inbreeding and having a functional society which operates in its members best interests. inbreed too much and you get clans and tribes (not to mention lots o’ genetic diseases) which make a society dysfuntional and divided; outbreed too much and you get too much individualism, another sort of dysfunctionality where each guy is out for himself.

**NO pun intended! (~_^)

update: i meant (and then forgot) to mention the most famous cousin-marrying jew of all — a. einstein. his second wife was elsa löwenthal (née einstein). that “née einstein” gives ya a clue right there. elsa was albert’s maternal first cousin AND paternal second cousin. but, they had no kids, so it really doesn’t count.

(note: comments do not require an email.)

controlling the mating game

via ferdinand, al** says (in a post about sexual age of consent):

“Modern societies are extremely hung up on sex for many reasons. Part of it comes from conservative religious values, but another part of the problem comes from leftist feminist constipative tendencies. Wherever you look, there are always those who want to force their way into your bedroom or hotel room.”

i got news for ya, al. ALL societies are extremely hung up on sex — including even non-human animal societies. and we’re not all hung up on sex “for many reasons” — we’re all hung up on sex for just one reason: because the whole point of life is to reproduce one’s genes (i.e. we’re just “machines for our genes“).

THIS is the reason — and the ONLY reason — why so many people want to “force their way into your bedroom or hotel room.” not because they ultimately care WHAT you do in your bedroom or hotel room (although they might say that, most people don’t know what they’re really about). no. they ultimately care WHO you’re doing in your bedroom or hotel room.

people are concerned about who their kids (most often their female kids) mate with because they’re concerned about how their genes are getting passed on.

they’re concerned that the people their kids (i.e. their genes) are mating with have “good” genes. they’re concerned that the people their kids (i.e. their genes) are mating with will take good care of any offspring (i.e. more of their genes). they’re concerned that all the time and effort and money they spent on raising their kids (i.e. their genes) won’t go to waste.

it’s just social control of reproduction (of genes), that’s all. and it happens in all sorts of societies in all sorts of ways.

**yes. i know that’s not al’s name. (~_^)

(note: comments do not require an email.)