Thirty years ago, in a remote village of Bangladesh, a modest economics professor took thirty dollars out of his own wallet and loaned it to a group of women looking to start a small business. Told by nay-sayers that he'd never get the money back, the amount was repaid in full. Muhammad Yunus went on to found Grameen Bank in 1976, out of a conviction that it is small acts like this one can move people out of poverty. Today he is a Nobel Peace Prize winner who, starting with one simple loan, has influenced millions.