Ah, but here is something to think about ... if it wasn't genetic in the 1950's, it sure as hell would be by now.
America's welfare system has been consistently emasculating the hardworking middle class black in favor of the ace boon coon for the past forty years. You show me a man in the 1960's who held a job as a railroad porter, earned a decent wage, owned his own home and supported his own family, I'll show you a man who was rendered all but socially and sexually obsolete by 1970.
Black females learned to go for the fast pump with the quicky brother in order to maximize their benefits from the system, thus breeding bonobos of equal irresponsibility as their fathers. The poor struggling black lower middle class man who was stable enough to hold down a job and keep a paycheck coming in was regarded as an undesirable sucker by black women who knew the real money was to be found by interludin' with the homeys who practiced fire'n'forget with their DNA syrup. Fewer fathers, bigger benefits and in three generations we now have a species specially bred to be dependent hopheads. What started with borderline genetic competency to function in an industrial society in the 1950's was quickly eliminated in favor of the flash brother just passing through sprayin' his fertility funk with no thought of responsibility to his progeny.
I have seen the sane black man long since passed over in favor of a flashy hood and he has been marginalized in his own community, just an Oreo sucker no fly girl would be seen dead with.
IF it wasn't genetic in the beginning it sure as hell is by now.