Russell Simmons, the original and eternal hip-hop mogul, is one of the most innovative and influential figures in modern American business and culture. When no one outside of inner-city New York had even heard of hip-hop, Simmons saw the seeds of a global force that would change the way people talk, dress, listen to music, and choose the heroes they hang on their walls. Today, he oversees a sprawling, multimillion-dollar empire of culture-defining...