Posted on 09/07/2008 9:41:27 AM PDT by Pharmboy
Eight years ago, I published an article in these pages called "Wandering Jews—and Their Genes" (September 2000). At the time I was working on a book about a Tibeto-Burmese ethnic group in the northeast Indian states of Mizoram and Manipur, many of whose members believe that they descend from the biblical tribe of Manasseh, and about a group of Judaizers among them known as the B'nei Menashe, over a thousand of whom live today in Israel as converts to Judaism.
This led me to an interest in Jewish historical genetics, then a new discipline. Historical genetics itself was still a pioneering field, launched by the discovery that two sources of DNA in the human body, the Y chromosome that determines male sex and the mitochondria that aid cell metabolism, never change (barring rare mutations) in their transmission from fathers to sons and from mothers to children of both sexes. This made it possible to trace paternal and maternal lines of descent far into the past and to learn about the movements and interactions of human populations that originated hundreds, thousands, and even tens of thousands of years ago.
In my article, I observed that preliminary studies in Jewish genetics had both "shored up" and "undermined" some conventional ideas about Jewish history. On the one hand, they had indicated that there was a high degree of Y-chromosome similarity among Jewish males from all over the world, coupled with a much lower degree when the comparison was made between Jews and non-Jews in the same region. The one part of the globe in which Jews correlated as highly with many non-Jews as they did with other Jews was the Middle East—precisely what one might expect of a people that claimed to have originated in Palestine (or in Ur of the Chaldees, if you go back to Abraham) and to have spread from it.
Other studies established that the Y chromosomes of kohanim—male Jews said to descend from the priestly caste whose supposed progenitor was the biblical Aaron—had their own unique DNA signature, labeled the Cohen Modal Haplotype. Not only did half of all kohanim, who comprise about four percent of the world's Jewish population, share this DNA configuration, but minor mutations in it pointed to a common ancestor who lived a few centuries before or after 1000 B.C.E.—that is, close to the period in which Aaron and his brother Moses are situated by biblical chronology.
Such evidence seemed to confirm traditional notions of Jewish origins. It suggested that the Jews, while certainly not a "race," were indeed, despite the skepticism of many modern historians, the highly endogamous people they had always considered themselves to be, one that had admixed with outsiders relatively little during long centuries of wandering in the Diaspora. It also strengthened the reliability of the Bible as a historical source. Modern critics who contended that the Bible was a late document that imagined a largely non-existent past had always singled out the priestly codes of the Pentateuch as a prime illustration of this. But if the priesthood was really an institution going back to early Israelite history, rather than the backward projection in time of later generations, revisionist Bible criticism itself needed to be revised.
Yet there was contrary evidence, too. Early studies of mitochondrial DNA reported that Jewish women, unlike Jewish men, did not correlate well with one another globally. Furthermore, the greatest demographic mystery of Jewish history—that of the origins of the Ashkenazi population of Central and Eastern Europe—had only appeared to deepen.
The standard Jewish version of these origins was that Ashkenazi Jewry had first crystallized in the late first millennium of the Christian era in the French-German borderland along the Rhine; that it had reached the Rhineland from southern France, to which it had come in earlier centuries either directly from Palestine or via Italy and Spain; and that it had then migrated eastward and northward into Central and Eastern Europe.Even before the advent of historical genetics, however, this account had been challenged. There were linguists who argued that East European Yiddish, the Germanic language of most Ashkenazi Jews, had more in common with the dialects of southern and southeastern Germany than with those of the Rhineland in the west. There were demographers who contended that the Jewish population of the Rhineland prior to the appearance of East European Jewry, which would eventually become the world's largest Jewish community, was too small to account for the latter's rapid growth.
The early genetic findings appeared to support the challengers. If the Rhineland theory was correct, Ashkenazi DNA should have had greater affinities with non-Jewish DNA from northern France and western Germany than with non-Jewish DNA from elsewhere; no one denied, after all, that wherever and whenever Jews had lived, some Gentiles must have joined them or begotten children with them. Yet there was no sign of this. Where, then, had Ashkenazi Jewry come from?
It was a mixed picture. Since then, eight years have gone by, historical genetics has greatly refined its methods and taxonomy, and several major new studies in Jewish genetic history have been published. What, viewed from their perspective, does Jewish history look like now?
_____________
Two new books address this question. One, David B. Goldstein's Jacob's Legacy: A Genetic View of Jewish History, is the work of a scientist who teaches at Duke University and has been personally involved in much Jewish genetic research.1 The other, Jon Entine's Abraham's Children: Race, Identity, and the DNA of the Chosen People, is by a layman and journalist.2 Yet since Entine has done a serious and responsible job of reporting, and Goldstein has written a non-technical survey for the general reader, the difference between them is one more of style than of substance. They agree on most major points, starting with the puzzling disparity in the distribution patterns of Jewish Y-chromosome and mitochondrial DNA.
The fact of this disparity is now solidly established. There is no doubt that statistically (and only statistically: it is important to keep in mind that any randomly chosen Jewish individual may prove an exception to the rule), Jewish males with antecedents in such widely separated places as Yemen, Georgia, and Bukhara in Central Asia are far more likely to share similar Y-chromosome DNA with one another than with Yemenite, Georgian, or Bukharan non-Jews. Jewish females from the same backgrounds, on the other hand, yield opposite results: their mitochondrial DNA has markedly less resemblance to that of Jewish women from elsewhere than it does to that of non-Jewish women in the countries their families hailed from. The main difference between them and these Gentile women is that their mitochondrial DNA is less varied—that is, they descend from a small number of maternal ancestors. Geneticists call such a phenomenon, in which a sizable population has developed from a very small number of progenitors, a "founder" or "bottleneck" effect. (In "bottlenecks," these few progenitors are survivors of larger groups that were drastically reduced by war, famine, plague, or other calamities.)
This calls for a new understanding of the spread of Jewish settlement in the Diaspora. Until now, it has been assumed that nearly all of the world's Jewish communities began with the migration of cross-sections of older communities, which took their families, institutions, and practices with them and perpetuated their lives in new surroundings. Now, it would seem, as David Goldstein writes, that
[some] Jewish men . . . travel[ed] long distances to establish small Jewish communities [by themselves]. They would settle in new lands and, if unmarried, take local women for wives. The communities might [at a later date] have been augmented by additional male travelers from Jewish source populations. Once they were established, however, the barriers would go up against further input of new mitochondrial DNA, precisely because of female-defined ethnicity [i.e., the halakhic practice of determining Jewishness by the mother]; few [additional] females would be permitted to join. Presumably, these adventurous bachelors setting out (perhaps on business ventures) for far lands could not persuade Jewish women to come with them, or else they traveled to their destinations with no intention of staying there. In the absence of rabbis to perform conversions, they married local women who, while consenting to live as Jews, were not halakhically Jewish. By halakhic standards, therefore, their descendants were not Jewish, either, even though their Jewishness was not challenged by the rabbinical authorities. Although such communities must, in their first generations, have known the truth about themselves, this does not appear to have bothered them or anyone else very much.
Combo ping for those with genetic, Jewish and humanity interests (or even all three).
That is an unproven assumption which can never be validated with DNA evidence alone. Show me the historical doccuments.
Am I alone, or is that confusing? IMHO, he should have written:
All sons inherit their father's Y chromosome. All children inherit their mother's mitochondrial DNA.
Warning! This is a high-volume ping list.
High Volume. Articles on Israel can also be found by clicking on the Topic or Keyword Israel. or WOT [War on Terror]
----------------------------
I doubt there are any. The general concern has been assimilation and loss of Jewish identity, not the creation of not halakhically Jewish Jewish communities.
 |
Genetic Genealogy  |
| Send FReepmail if you want on/off GGP list Marty = Paternal Haplogroup O(2?)(M175) Maternal Haplogroup H |
|
| GG LINKS: African Ancestry DNAPrint Genomics FamilyTree DNA GeneTree mitosearch Nat'l Geographic Genographic Project Oxford Ancestors RelativeGenetics Sorenson Molecular Genealogy Foundation Trace Genetics ybase ysearch |
|
| The List of Ping Lists | |
The evidence is in the genes...and these Jews would likely NOT have had rabbis with them to convert the women.
save for later
|
|
|||
Gods |
Thanks Pharmboy. |
||
|
· Mirabilis · Texas AM Anthropology News · Yahoo Anthro & Archaeo · · History or Science & Nature Podcasts · Excerpt, or Link only? · cgk's list of ping lists · |
|||
It took 8 years to figure that out? I would have guessed that before reading the article. Isn't it the same for other populations, as well? (Except for the part about putting up later barriers against marriage outside the clan.) (Sorry -- my quote disappeared when posting the earlier remark.)
Self-ping to Commentary.
I should've posted this instead.
This assumes a lot, in particular the “profession” (like every other profession) of rabbi was a lot less formalized back then than now.
A Beit Din, technically needs, what, three adult jewish males? Sure, there is almost always (now) one man who is, by profession a rabbi and it is very formalized, but in the pre-middle ages? Who knows?
Body of water for the mikva/tevilah, a kabbalat ol mitzvot (agreement to do the commandments), taking the name (probably Ruth or Sarah). . . . no mila for the females -— so I don’t see how this would be a problem.
Unauthorized access: Embedding an image from someone else's website is Bandwidth Theft! Please don't do this.Looks like a good graphic to upload to tinypic though... ;')
RMFE. Friggin' Drama Queen.
:’) That’s what the first graphic said (to me). Not in an audible voice of course.
Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.
