This course is a mixed design including qualitative and quantitative data gathering for both descriptive and exploratory purposes. The fundamental research question is how do the recovery needs of residentially unstable substance abusers who are provided with transitional housing within a social business model compare with the recovery needs of substance abusers who are not residentially unstable. How to Change the World provides vivid profiles of social entrepreneurs. The course is an In Search of Excellence for social initiatives, intertwining personal stories, anecdotes, and analysis. Readers will discover how one person can make an astonishing difference in the world.