Bands like R.E.M., U2, Public Enemy, and Nirvana found success as darlings of college radio, but the extraordinary influence of these stations and their DJs on musical culture since the 1970s was anything but inevitable. As media deregulation and political conflict over obscenity and censorship transformed the business and politics of culture, students and community DJs turned to college radio to defy the mainstream--and they ended up disrupting popular...