“The chief reasons why so many people are loath to admit the genetic variability of socially and culturally significant traits are two. First, human equality is stubbornly confused with identity, and diversity with inequality, as though to be entitled to an equality of opportunity, people would have to be identical twins. Human diversity is not incompatible with equality. Secondly, it is futile to look for one-to-one correspondence between cultural forms and genetic traits. Cultural forms are not determined by genes, but their emergence and maintenance are made possible by the genetically conditioned human diversity.”
– Theodosius Dobzhansky, “The problem of human evolution”
Dobzhansky T. 1963. Anthropology and the natural sciences – The problem of human evolution. Curr Anthropol 4:138+146-148.