Scott Johnson 55: "[O]nly the world of jazz and improvisation comes close to approximating the structure of the bygone European musical ecosystem, in the sense that jazz still encompasses a complete range of simple and complex musical uses under one roof. Even the most technically advanced improviser retains an ability and feel for playing the blues, which is both a historical source for jazz and a living folk music that now survives as a branch of rock."
"the electrification of the blues during the 1950s is now being mirrored in scores of folk musics around the world"