Phi Beta Sigma— This 102-year old fraternity was founded at Howard University on the tenets of brotherhood, scholarship and service. Since then, it’s members, known as Sigmas, have swelled to more than 100,000, and include Dr. George Washington Carver, Rep. John Lewis (D-Georgia). Former President Bill Clinton and actors Blair Underwood and Malik Yoba are all honorary member. The Sigma’s motto is “Culture for service and service for humanity.”