Sex & Race Vol 2Sex and Race, Volume 2 by J. A. Rogers In the Sex and Race series, first published in the 1940s, historian Joel Augustus Rogers questioned the concept of race, the origins of racial differentiation, and the root of the ""color problem."" Rogers surmised that a large percentage of ethnic differences are the result of sociological factors and in these volumes he gathered what he called ""the bran of history""the uncollected, unexamined history of black