I had this discussion with my brother one day. He said that he bets if he or I raised one of these kids since their birth, they would be getting good grades, have no record, and lead a normal life.
I don’t know how much of a part the bell curve would play.
I've watched this happen. But "culture" (term used loosely) is a powerful force; it sucks the kids into a vortex of failure before they're out of diapers.