The general consequences of race mixture can be predicted with confidence

Thursday, August 10th, 2017

A Duke ethics professor made a terrible mistake:

After reading some recent work on the biology of group differences last summer, it occurred to me that as an ethics professor, I should write something about the moral upshot: if there are such differences, what are the consequences for how we should treat one another? Should we support policies that attempt to equalize opportunities only if they produce equal outcomes?

My conclusion was modest: if there are biological differences between groups, and if, as Lee Jussim has argued, some stereotypes turn out to be accurate in part because of correct generalizations about biological differences, these facts should not undermine our commitment to treating one another as moral equals, or to increasing opportunity for all, regardless of group membership.

But I had committed a sin in the eyes of the two referees who read and commented on my paper. I simply acknowledged the possibility of group differences while arguing that whether or not they exist, they should not matter. For having done that, the two journal referees used expletives and exclamation points to give the most venomous and dismissive feedback I have ever encountered. (Needless to say, the paper was not accepted for publication after such hostile comments.)

This leads Razib Khan to share R. A. Fisher’s thoughts on race and human genetic variation, in response to the UNESCO statement on the Race Concept, published after WWII:

In so far as the Statement condemns any defamation of races and emphasizes the appalling nature of the recent abuse of racial theory, it has my full and unqualified approval. I wholeheartedly agree, also, with its explicit and implicit finding that anthropology and racial studies afford no justification for the assumption that members of any particular race are not entitled the enjoyment of all fundamental rights, or for any form of racial discrimination. And I am very glad that, after all the horrors that have been perpetrated, these principles should have been enunciated clearly and publicized widely by an organization of such standing and by distinguished men as the authors of this Statement.

But the Statement also purports to be an authoritative body of scientific doctrines, and this is quite a different matter. Without touching upon the content of these doctrines, and quite apart from whether or not they meet with my approval, I must register my fundamental opposition to the advancing of scientific theses as such, and protest against it.

I recall the National Socialists’ notorious attempts to establish certain doctrines as the only correct conclusions to be drawn from research on race, and their suppression of any contrary opinion; as well as the Soviet Government’s similar claim on behalf of Lysenko’s theory of heredity, and its condemnation of Mendel’s teaching. The present Statement likewise puts forward certain scientific doctrines as the only correct ones, and quite obviously expects them to receive general endorsement as such. I repeat that, without assuming any attitude towards the substance of the doctrines in the Statement, I am opposed to the principle of advancing them as doctrines. The experience of the past have strengthened my conviction that freedom of scientific enquiry is imperiled when any scientific findings or opinions are elevated, by an authoritative body, into the position of doctrines.

Fisher believed that human groups differ profoundly “in their innate capacity for intellectual and emotional development” and concluded that the “practical international problem is that of learning to share the resources of this planet amicably with persons of materially different nature, and that this problem is being obscured by entirely well intentioned efforts to minimize the real differences that exist”.

Khan goes on to quote from page 238 of his edition of The Genetical Theory of Natural Selection:

The general consequences of race mixture can be predicted with confidence…Their general character will therefore be intermediate, but their variability will be greater than that of the original races. Morever, new combinations of virtue and ability, and of their opposites, will appear in the mixed race, combinations which are not necessarily heterozygous, but may be fixed as permanent racial characters. There are thus in the mixed race great possibilities for the action of selection. If selection is beneficient, and the better types leave the greater number of descendants, the ultimate effect of mixture will be the production of a race, not inferior to either those from which it sprang, but rather superior to both, in so far as the advantages of both can be combined. Unfavorable selection, on the other hand, will be more rapidly disastrous to a mixed race than to its progenitors. It should of course be remembered that all existing races show very great variability in respect of hereditary factors, so that selections of the intensity to which mankind is exposed would be capable of producing rapid changes, even in the purest existing race.


  1. Bomag says:

    There are thus in the mixed race great possibilities for the action of selection

    Maybe in an academic sense; more likely we see the exceptional traits lost, never to be exhibited again. The fantasy is to cross quack grass with quinoa, and eventually get a hardy perennial with sweet fruit; we mostly end up with endless generations of sickly annuals bearing sour fruit. Most plant and animal breeders succeed by improving the existing narrowly adapted lines.

Leave a Reply