Race and IQ

The Theory of Innate Differences

To understand the theoretical conundrums underlying this race question, the hypothesis must be stated plainly: Genetic differences between groups of people produce innate differences in their cognitive abilities. The key is the word, “innate.” What exactly it means for a characteristic to be innate is one of the great questions in the philosophy of biology, and like most great philosophical questions it gets deeper and more puzzling the longer you think about it. Our initial intuition is that something that is innate just happens as a matter of biological development, regardless of environmental inputs. Dogs have an innate tendency to bark; ducks quack.

But the intuitive view turns out to be incoherent on more than superficial examination. A point of view that is sometimes called developmentalism points out that absolutely no aspect of biology or genetics comes into being automatically without rich interaction with the environment. Ducks raised in the complete absence of auditory input from other ducks don’t quack, and in general organisms raised in the absence of environmental inputs don’t do anything at all. So the difference between learning to play the oboe and learning to walk is not that the former requires environmental input while the other does not, being in principle innate. They both emerge from a complex interplay of genetics and environment, and thinking of walking as innate is a distraction from the real scientific question of how the extraordinarily complex process actually comes about. Once you start to think this way, it gets difficult to say that any difference between two organisms is innate. The contention about Africans and IQ has to be that their genetic makeup is such that they will be lower than other races in IQ not only in the current environment, but in all imaginable alternative environments, and how could we possibly know that?

The developmentalist argument, however, is susceptible to a reductio ad absurdum. If taken too literally, it could lead you to conclude that there is nothing to be said about biological differences between organisms. You couldn’t say that people are more intelligent than turtles, or that Africans have darker skin than Scandinavians, because it is always possible in principle to imagine an environment where that isn’t the case. And there is a difference between learning to play to oboe and learning to walk: Walking may depend in complex ways on environmental input, but it nevertheless develops in a very wide range of environments, whereas oboe playing requires a very specific environment to develop. Geneticists have come up with the concept of a reaction norm to describe the range of environments in which a genetic trait might develop. Under this view, characteristics of organisms are not either innate or learned: they vary in the width of the reaction norm describing the kind of environmental inputs they require. Under this view, the race and IQ question comes down to the question of whether African IQ deficits are like dark African skin, so pervasive across all imaginable environments that calling them innate is perfectly reasonable as a first approximation, or more like African-American success in popular music, for which we require no scientific evidence to attribute to the particular combination of history, culture and sociology of the present time. We are justifiably offended by a hypotheses involving, say, an innate gift of rhythm.

Why Race Science is Objectionable

If I may address my fellow Jews for a moment, consider this. How would you feel about a line of research into the question of whether Jews have a genetic tendency to be more concerned with money than other groups? Nothing anti-semitic, mind you, just a rational investigation of the scientific evidence. It wouldn’t be difficult to measure interest in money and materialism, and it wouldn’t surprise me if as an empirical matter Jews scored a little higher on the resulting test than other groups. As a behavioral geneticist I can assure you without reservation that the trait would be heritable, and, if anyone bothered to take the time to find out, specific genes would have small associations with it. Of course, this research program has already been carried out, at least to the extent the relevant technology was available in 1939. While we are at it we could open a whole scientific institute for the scientific study of racial stereotypes, and finally pull together the evidence on sneaky Japanese, drunken Irish, unintelligent Poles, overemotional women and lazy Italians.

Hopefully I am beginning to offend you. Why? Why don’t we accept racial stereotypes as reasonable hypotheses, okay to consider until they have been scientifically proven false? They are offensive precisely because they violate our intuition about the balance between innateness and self-determination of the moral and cultural qualities of human beings.

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