Kool DJ Herc. Afrika Bambaataa. Grandmaster Flash. Old School, you say? Hell, these three are the founding fathers of hip-hop music—the progenitors of the world’s dominant youth culture. For them, hip-hop is not a record, a concert, a style of dress or a slang phrase. It is the constancy of their lives. It defines their past and affects their view of the future. As DJs in the ’70s, these three brothers were the nucleus of hip-hop—finding the records, defining the trends, and rocking massive crowds at outdoor and indoor jams in parts of the Bronx and Harlem.