High Quality Content by WIKIPEDIA articles! The Yale Entrepreneurial Society (YES) is a student-run nonprofit 501(c)3 organization dedicated to encouraging entrepreneurship and business development in the New Haven, Connecticut area. YES was founded in 1999 by Yale undergraduates Sean Glass and Miles Lasater. Its social entrepreneurship program—focused on not-for-profit and socially responsible organizations—was founded the same year, with efforts led by fellow student David Pozen. Today, YES members include Yale undergraduate, graduate, professional students, and faculty, as well as several hundred Yale alumni around the world.