Smarter people are not richer - and that’s a rule!

Education, perhaps? Opportunities and opportunities. Rich parents can make a big difference. Maybe intelligence? It makes sense: almost every highly successful businessperson is smart. But that's a correlation, not causation. When Nobel Prize-winning economist James Heckman asked people how big a role innate intelligence plays in financial success—how much the difference between your income and mine, for example, is based on our relative IQs—most people said 25