William Drayton (born 1943) is an American social entrepreneur. Drayton was named by U.S. News & World Report as one of America's 25 Best Leaders in 2005.[1] He is responsible for the rise of the phrase "social entrepreneur",[2] a concept first found in print in 1972.[3] Drayton is the founder and current chair of Ashoka: Innovators for the Public, a 501(c)(3) organization dedicated to finding and