A sweep of radio history from its birth as Marconi's ""wireless telegraph"" through its current status under deregulation, this book analyzes the changing medium's social, political, and cultural impact. It casts new light on many topics, including the roles of women and African Americans, programming sources outside the Hollywood-Broadway nexus, and the arguments about ""Amos 'n' Andy"" - once the hit that jump-started radio's young networks, now a controversial remnant of a bygone era.