Drawing on scores of interviews and numerous manuscript collections, as well as his own extensive files, Cohen shows how a broad range of traditions -- from hillbilly, gospel, blues, and sea shanties to cowboy, ethnic, and political protest music -- all contributed to the genre known as folk. He documents the crucial work of John Lomax and other collectors who, with the assistance of recording companies, preserved and distributed folk music in the 1920s. During the 1930s and 1940s, the emergence of left-wing politics and the rise of the commercial music marketplace helped to stimulate wider interest in folk music. Stars emerged, such as Woody Guthrie, Leadbelly, Pete