[iFreilicht]

How is that relevant? A few examples do not disprove anything. It's pretty common knowledge that the more successful/rich etc. your parents were, the more likely you'll be successful/rich etc.

This does not directly prove the theory your parent comment posits, being that better circumstances during a child's development improve the development of that child's brain. That would require success being a good predictor of brain development, which I'm somewhat uncertain about.