Robert Cantwell engages the historical background, commercial origins, internal workings, and cultural and social significance of popular, old-time music to provide a unique musicological and sociological perspective. Well versed in the history of the tradition and as interested in those who listen to the music as in those who create it, Cantwell links bluegrass to its hillbilly roots in Appalachia and shows how the music was transformed by African American folk traditions, the influence of jazz, ragtime, blues and country music; and the growth of radio and recording technology.