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Lewontin: "Is There a Jewish Gene?"
The New York Review of Books is the intellectual institution least changed since my childhood. The big names I read in the 1970s, such as Garry Wills, Russell Baker, and Joyce Carol Oates, are still writing for the NYRoB.
Is There a Jewish Gene? DECEMBER 6, 2012Richard C. LewontinLegacy: A Genetic History of the Jewish People
by Harry Ostrer
Oxford University Press, 264 pp., $24.95The Genealogical Science: The Search for Jewish Origins and the Politics of Epistemology
by Nadia Abu El-Haj
University of Chicago Press, 311 pp., $35.00The question of ancestry has been of human concern in virtually all cultures and over all times of which we have any knowledge. Whether it be a story about the origin of a particular tribe or nation and its subsequent mixture with other groups, or curiosity about a family history, there is always the implication that we understand ourselves better if we know our ancestors and that we, within ourselves, reflect properties that have come to us by an unbroken line from past generations. As treasurer of the Marlboro Historical Society in Vermont
Marlboro, VT: sounds pretty vibrant ...
, I am the recipient of requests for printed copies of the Reverend Ephraim Newton’s mid-eighteenth-century history of our town, 70 percent of whose pages consist of “Genealogical and Biographical Notes” and a “Catalog of Literary Men.” Over and over our correspondents write of the “pride” they have in descending from these early settlers.
Surely pride or shame are appropriate sentiments for actions for which we ourselves are in some way responsible. Why, then, do we feel pride (or shame) for the actions of others over whom we can have had no influence? Do we, in this way, achieve a false modesty or relieve ourselves of the burdens of our own behavior? As a descendant of late-nineteenth-century Eastern European immigrants I cannot depend on Reverend Newton’s pages to explain my frequent contributions to The New York Review, but neither have the extensive “begats” in Genesis 10 or Matthew 1 been more enlightening.
My own skepticism notwithstanding, the belief is widespread that knowledge about the personal characteristics of ancestors who have never directly entered into our lives is relevant to our own formation. Moreover, that relevance is seen not simply as arising from our conscious knowledge about those ancestors, but from a deeper source, our genetical inheritance, which also would operate to form us in part, irrespective of our consciousness of the past. That belief is summed up in the title of Harry Ostrer’s book, Legacy: A Genetic History of the Jewish People. It is also implied in the title of a book by Raphael Falk, Zionism and the Biology of the Jews, whose English translation from the Hebrew original has yet to appear. While the term “race” is not used explicitly in these titles, in large part because the term is so loaded, there is considerable discussion of the Jews as a race or, using a less charged word, as a “people.”
“Race” is a term of uncertain etymology and many meanings. It may refer to a whole species (the “human race”), a collection of loosely related individuals with a common appearance (the “white race”), a nation (the “race of Englishmen”), or a single family (“he was the last of his race”). Compounding the ambiguity is the substitution of “people” or “tribe” that seems to shed the historical fardels with which “race” is burdened. Are the Navajo a tribe, a people, or even a race?
For casino purposes, the Navajo are a "nation."
In a former time, when the classification of humans depended on manifest physical features like skin color, facial and hair form, and skull shape, members of a “race” as opposed to a “people” were claimed to be recognizable as such by the external physical features common to all individuals of the same “race.”
As opposed to today, when everybody ... well ... no doubt we're much more enlightened, but let's not go into any specifics, shall we?
In all these usages the implication is one of common ancestry tracing back ultimately to some relevant founding group, but obviously all such ancestries must incorporate members of other groups at various times in their histories. Even Cain managed to find a wife in the Land of Nod or else he married his sister. For the German National Socialists, having more than two Jewish grandparents was sufficient to define a Jew. But if every defined human group necessarily has, at any moment in its history, some ancestry from a variety of other collections of humans, how are we to delineate those groups and reconstruct their family histories?
Degree of inbreeding, obviously.
Ordinary genetics is not sufficient. Each of us has one copy of our chromosomes from our mother and one copy from our father. But of the chromosomes I got from my mother, half of those came from her mother and half from her father so, roughly speaking, I resemble my maternal grandmother only in a quarter of my genes. It doesn’t take many generations before I resemble a particular remote great-grandparent in a very small fraction of my genes. If one of my ancestors four generations ago were black
I would bet a considerable amount of money that none of Lewontin's ancestors four generations ago were black.
, there is a good chance I would have inherited none of her pigment genes or so few that they would not be apparent in my own skin color.
Because, obviously, blackness is solely about skin color.
This random inheritance of genes makes it very difficult to reconstruct the variety of ancestors in remote past generations.
But not impossible. It's a daunting statistical problem, but we're getting better at daunting statistical problems ever year. Lewontin may not be quite up to speed on post 1975 developments, but there are these things called chips, which, I've heard, keep getting faster and cheaper.
Fortunately for those interested in the reconstruction of ancestry there are two useful exceptions to the rule that we inherit only a random one of the two sets of genetic information possessed by each of our parents. One of those exceptions is the single Y chromosome carried by males but not by females. ...
The other exception to random inheritance is not in the chromosomes, but in cellular particles called ribosomes that contain not DNA but a related molecule, RNA, which has heritable variation and is of basic importance to cell metabolism and the synthesis of proteins. Although the cells of both sexes have ribosomes, they are inherited exclusively through their incorporation in the mother’s egg cell rather than through the father’s sperm. Our ribosomes, then, provide us, both male and female, with a record of our maternal ancestry, uncontaminated by their male partners.
Harry Ostrer, who is a professor of genetics at Albert Einstein College of Medicine, and Raphael Falk, who is one of Israel’s most prominent geneticists, depend heavily on our ability to trace ancestry by looking at the DNA of Y chromosomes and ribosomes. Their books are responses to the widespread desire to trace that ancestry and to describe the degree to which the world’s present distribution of Jews consists, with a few possible exceptions like the Kaifeng Jews of China, of people with ancient common roots. For Falk, as the child of German Jews threatened with the Final Solution, the longing for Zion was expressed, as in his parents’ case, “primarily as a wish for relief from the persecutions and other hardships of Jewish life in the Diaspora.” For Ostrer, on the other hand, as he writes in his preface:
Having a 3000-year genetic legacy can be a source of group identity and pride in the same way that having a shared history, culture, and religion can be sources of pride.
As Walter Sobchak noted in The Big Lebowski, "Three thousand years of beautiful tradition, from Moses to Sandy Koufax ..."
Once again we have the question of why having knowledge of remote ancestors and a shared history makes us “proud.” Is it that preening ourselves before the glass of history seems less egotistical than inspecting our images in the glass of fashion?
The difference between the motivations of the authors is manifest in the properties each assigns to heredity. The element of “pride of ancestry” that permeates Ostrer’s text leads him, especially in his chapter on “Traits,” to extensive discussions of intellectual and professional accomplishment and the degree to which they may reflect innate biological capacity. While he can hardly be described as a naive biological determinist, it seems clear that he leans in the direction of attributing some importance to the biology of the Jews in forming their social accomplishments. He asserts that
accidents of birth, wealth, privilege, and education are not sufficient to explain who will become outstanding lawyers or physicists.
Nevertheless, Ostrer does not offer any evidence that the intellectual qualities that make so many Jews into lawyers and physicists are a consequence of their genetic superiority. Indeed, we know nothing about the genetics of nonpathological variation in the cognitive capacities of the brain.
Well, we didn't back in 1975. And that's what counts.
An attempt to determine whether intellectual life is genetically heritable would require a large adoption study in which infants would be reared in a controlled environment in circumstances that prevented their caretakers from knowing their family or social origins. Moreover, given the sensitivity of central nervous system development to nutritional and other external factors, the study would have to begin with newborn infants and we would still miss the effects of prenatal circumstances. We should not be surprised that such a study has not been done.
Or, we could do lots of imperfect but highly informative adoption and twin studies of naturally occurring experiments and see what those tell us. Oh, wait, those have been done ...
Ostrer’s view of the causes of the high frequency of intellectual careers among Jews is purely speculative. After more than a century of claims that high intellectual or artistic accomplishment is somehow rooted in heredity and, more specifically, in the possession of “genes for high intelligence” or “genes for creativity,” there is no credible evidence for their existence.
Well, not in 1975, there wasn't.
Indeed, the search for genetic superiority has largely given way to an extensive effort to find the genetic basis for a host of physiological debilities. There is a certain irony in claiming an undemonstrated biological superiority for a group, six million of whom were slaughtered for their claimed natural degeneracy.
Despite this interest in the social and intellectual characteristics of Jews, to which he devotes about a fifth of his text, Ostrer’s chief concern is with the history of the Jews, as revealed in their actually known genetic similarities to and differences from other populations. These similarities and differences occur thanks to various proportions of alternative genetic forms rather than being absolute differences between populations. There is no known “Jewish gene,” and the same comments I have made about the evidence concerning genes for “high intelligence” and “creativity” apply to the existence of those properties in alternative genetic forms.
Democrats love to make fun of Republicans as anti-science, but the anti-science stance of a famous leftist scientist-intellectual goes unremarked.
... Once again, as in works on the genetics of race, we encounter the concept of an “authentic” self that lies hidden and unexpressed, but which in some sense is the essence of what I am, even if unperceived and without a basis in any scientific demonstration. The concept of a self that is an authentic essence, but not clearly perceived, suggests that my manifest properties and attitudes are a mere patina and that, in ways that I do not recognize, my inherited inner self is struggling to assert itself.