It might also be a cultural thing. American society is very ambitious, and the environment BG grew up in appears to be on the extreme end of it.
The intelligence factor is harder to measure, but I'm not sure if business savvy and entrepreneurial drive are things you're born with, or traits you pick up as you grow.
All that aside, there are stories where the down and out Joe bootstraps himself to riches through hard work/ambition/etc. so it's hard to say what is causing what. In fact I feel that I'm very ambitious/entrepreneurial, even though my parents were an engineer and chemist for a very large corporation.
The intelligence factor is harder to measure, but I'm not sure if business savvy and entrepreneurial drive are things you're born with, or traits you pick up as you grow.
All that aside, there are stories where the down and out Joe bootstraps himself to riches through hard work/ambition/etc. so it's hard to say what is causing what. In fact I feel that I'm very ambitious/entrepreneurial, even though my parents were an engineer and chemist for a very large corporation.