76. Leon Black
the son of a wealthy businessman and an artist, black went to fieldston in the bronx for high school and then to dartmouth, where he majored in philosophy and history. his father died in 1975, and black put his $75,000 life insurance payout into commodities trading, increasing it to more than $600,000, only to lose all but $25,000. he cofounded apollo global management in 1990, the year his former employer drexel burnham lambert filed for bankruptcy; he is still ceo and chairman of the $232 billion (assets) firm.