Culture is the cause, though of course it's correlated with intelligence and income level, which is what confuses people. Not all cultures are created equally.

Culture is the cause, though of course it's correlated with intelligence and income level, which is what confuses people. Not all cultures are created equally. What your parents did in the home, and who your friends were matter much more than anything else. Does a Jewish kid from a family of scientists and scholars have much in common with so-called "white trash"? They're both white, right? Does the child of a black immigrant who comes from a culture of learning and achievement have much in common with some other random brown-skinned person? They're both brown, right? The problem here isn't race. It's a loser culture.