Arthur C. Brooks, a Harvard professor who teaches a popular course on happiness, explores the science behind what makes life fulfilling - defining happiness as a blend of enjoyment, satisfaction and meaning rather than just a fleeting feeling. Brooks also reflects on his unconventional path into academia, his book collaboration with Oprah Winfrey, and his personal philosophies on leadership, relationships and finding purpose. He spoke in an interview for "The David Rubenstein Show: Peer to Peer Conversations." This interview was recorded August 5 at the Johns Hopkins Bloomberg Center in Washington DC.