"Our character is not so much the product of race and heredity as of those circumstances by which nature forms our habits, by which we are nurtured and live."
-Marcus Tullius Cicero (106–43 B.C.), Roman orator, philosopher, statesman. De Lege Agraria, II, 95.
Granted, Cicero did not have the understanding of genetics that we have today. Nevertheless, his is an important perspective to keep in mind. Some culturally or historically derived behavioral traits that are particularly strongly represented among black women or among Asian men may become diluted over the generations, in the U.S.