Social and Environmental Enterprises examines organizations that place a social mission ahead of or on par with their financial mission. While studying real and fictionalized social enterprises, we discuss the structures within which social enterprises can thrive, potential sources for funding, the best governance structures, compensation, issues that arise when the organization scales and faces transitions, and tax considerations. We consider the current business, legal, and public policy context for social enterprises, as well as the public policy measures that could foster a healthier social sector.