Marc, an artistic documentary photographer, has used the camera not only to record the street life of various black communities but to penetrate the universality of black culture. While the very term "African American" embraces a transatlantic heritage, Marc has chosen to include the European element of the African diaspora, following the coordinates of the "Black Triangle." His goal was to discover differences and similarities in how people behaved in different climatic and social environments. His quest revealed far more shared than divergent traits. As we page through this propulsive, pictorial narrative, we find that without captions, we can't guess the setting. In every land, Marc captured the high energy of festivals, music, and dance as well as the sparkle and grace of adornment, and the concentration and abandon of games from soccer and basketball to chess and cards to tumbling and skateboarding. In each of the 88 black-and-white duotones, the pulse and sculpted strength of humanity transcend the hard geometry of asphalt and concrete. The message is: The beat goes on.