David Bornstein specializes in writing about social innovation. He is the author of The Price of a Dream and How to Change the World, which has been published in 20 languages. His articles have appeared in the Atlantic Monthly, the New York Times, and many other publications globally. He co-wrote the PBS documentary "To Our Credit." He is the founder of Dowser.org, a Web site devoted to uncovering stories of change. He lives in New York City.