"As a young economics professor at Chittagong University in Bangladesh in 1976, Muhammad Yunus lent $27 out of his own pocket to a group of poor craftsmen in the nearby town of Jobra. To boost the impact of that small sum, Yunus volunteered to serve as guarantor on a larger loan from a traditional bank, kindling the idea for a village-based enterprise called the Grameen Project. It never occurred to the professor that his gesture would inspire a whole category of lending and propel him to the top of a powerful financial institution.

Today, Yunus runs Bangladesh's Grameen Bank, a leading advocate for the world's poor that has lent more than $5.1 billion to 5.3 million people. The bank is built on Yunus' conviction that poor people can be both reliable borrowers and avid entrepreneurs. It even includes a project called Struggling Members Program that serves 55,000 beggars. Under Yunus, Grameen has spread the idea of microcredit throughout Bangladesh, Southern Asia, and the rest of the developing world."

"Yunus' innovation has broad appeal. In 1997 only about 7.6 million families had been served by microcredit worldwide, according to the 2005 State of the Microcredit Summit Campaign Report. As of Dec. 31, 2004, some 3,200 microcredit institutions reported reaching more than 92 million clients, according to the report. Almost 73% of them were living in dire poverty at the time of their first loan.

When Yunus started Grameen, he wanted to turn traditional banking on its head. One of his first moves was to focus on women because they are most likely to think of the family's needs. This was a radical step in a traditional Muslim society, and it took Yunus six years to reach his initial goal of a 50-50 gender distribution among borrowers. Today, 96% of Grameen's borrowers are women. "If banks made large loans, he made small loans. If banks required paperwork, his loans were for the illiterate. Whatever banks did, he did the opposite," marvels Sam Daley-Harris, director of the Microcredit Summit Campaign. "He's a genius."