" If there are not equal results among groups presumed to have equal genetic potential, then some inequality of opportunity must have intervened somewhere, and the question of precisely where is less important than the remedy of restoring the less fortunate to their just position. The fatal flaw in this kind of thinking is that there are many reasons, besides genes and discrimination, why groups differ in their economic performances and rewards. Groups differ by large amounts demographically, culturally, and geographically—and all of these differences have profound effects on incomes and occupations. "

― Thomas Sowell , Civil Rights: Rhetoric or Reality