With a few exceptions like Kraftwerk, most great 20th century Western music is in some way American-based. And the great paradox of America, the paradox that distills America, is that this greatest of American contributions to humanity, this American contribution that probably has influenced more people around the world for the good, that probably has brought more people around the world unqualified joy, was born of America's greatest evil, slavery. Or one of the two great evils anyway, counting the European extinction of those who were on the continent first.