For six years straight, Aaron Mihaly spent his summer vacations toiling for nonprofits in Latin America. So when he told friends and family what he would be doing last summer--an intensive program at an Ivy League business school--they thought he had given up on changing the world. "The common reaction I got was 'You're selling your soul to the devil,'" says Mihaly, 23, with a laugh.
Far from it. This fall Mihaly moved to Mozambique and dedicated himself to fighting poverty. But he carried a new weapon in his battle against social ills: aggressive business skills, taught in a new program...