What makes the parents bad? Part of it is the welfare state, where mothers are paid for having children, but have no financial incentive to raise them to be productive and law-abiding?
Behavior can also be influenced by genetics. For example, blacks have a 15% higher testosterone level than whites, which will influence aggressive behavior.
I consider the welfare state to be a “social circumstance.” As for your comment on testosterone levels, I guess if you’re looking for reasons to conclude that there’s no hope for blacks to succeed in America, you’ll find them somewhere.
Doesn’t mean your wrong, but it also doesn’t mean you’re being objective. Look hard enough for excuses to believe something, you will find some.