76. David Green & family
The son of a preacher, Green didn’t excel at academics—he repeated seventh grade—but a work-study program during his junior year of high school gave him a chance to work at a general store. Though he mostly swept floors and unloaded boxes for 60 cents an hour, he fell in love with the business and later met his wife at the shop. More than a decade later, in 1970, the couple borrowed $600 to start a crafts business that would become the Hobby Lobby chain. Today the $4.3 billion (sales) arts and crafts retailer stocks more than 75,000 items at over 800 locations. The family is one of the biggest supporters of Christian causes, with plans to open the Museum of the Bible in Washington, D.C., in late 2017.