“I do not claim that intelligence, however defined, has no genetic basis—I regard it as trivially true, uninteresting, and unimportant that it does. The expression of any trait represents a complex interaction of heredity and environment. [… A] specific claim purporting to demonstrate a mean genetic deficiency in the intelligence of American blacks rests upon no new facts whatever and can cite no valid data in its support. It is just as likely that blacks have a genetic advantage over whites. And, either way, it doesn't matter a damn. An individual can't be judged by his group mean.”

— Stephen Jay Gould , book Ever Since Darwin

"Racist Arguments and IQ", pp. 246–47
Ever Since Darwin (1977)

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Stephen Jay Gould 274

American evolutionary biologist 1941–2002

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“Sociobiology is not just any statement that biology, genetics, and evolutionary theory have something to do with human behavior. Sociobiology is a specific theory about the nature of genetic and evolutionary input into human behavior. It rests upon the view that natural selection is a virtually omnipotent architect, constructing organisms part by part as best solutions to problems of life in local environments. It fragments organisms into “traits,” explains their existence as a set of best solutions, and argues that each trait is a product of natural selection operating “for” the form or behavior in question. Applied to humans, it must view specific behaviors (not just general potentials) as adaptations built by natural selection and rooted in genetic determinants, for natural selection is a theory of genetic change. Thus, we are presented with unproved and unprovable speculations about the adaptive and genetic basis of specific human behaviors: why some (or all) people are aggressive, xenophobic, religious, acquisitive, or homosexual.”

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“The fact that a reasonable hypothesis has not been rigorously proved does not mean that it should be summarily dismissed. It only means that we need more appropriate research for putting it to the test. I believe such definitive research is entirely possible but has not yet been done. So all we are left with are various lines of evidence, no one of which is definitive alone, but which, viewed all together, make it a not unreasonable hypothesis that genetic factors are strongly implicated in the average Negro-white intelligence difference. The preponderance of the evidence is, in my opinion, less consistent with a strictly environmental hypothesis than with a genetic hypothesis, which, of course, does not exclude the influence of environment or its interaction with genetic factors.”

Arthur Jensen (1923–2012) professor of educational psychology

p. 82 of How Much Can We Boost IQ and Scholastic Achievement? (1969) https://en.wikipedia.org/wiki/How_Much_Can_We_Boost_IQ_and_Scholastic_Achievement%3F, the invited paper that created much hostility towards Jensen.

“The main contemporary obstacle facing African Americans is neither white racism, as many liberals claim, nor black genetic deficiency, as Charles Murray and others imply. Rather it involves destructive and pathological cultural patterns of behavior: excessive reliance on government, conspiratorial paranoia about racism, a resistance to academic achievement as "acting white," a celebration of the criminal and outlaw as authentically black, and the normalization of illegitimacy and dependency.”

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