The first type of rock music, rock and roll, originated in the United States in the 1950s, and was largely derived from music of the American South. In the United States, the affluence that followed the end of World War II in 1945 and the emergence of a youth culture—based in part upon the rejection of older styles of popular culture—helped rock and roll to displace the New York City-based Tin Pan Alley songwriting tradition that had dominated the mainstream of American popular taste since the late 19th century. Rock and roll was a combination of the R&B style known as jump blues, the gospel-influenced vocal-group style known as doo wop, the piano-blues style known as boogie-woogie (or barrelhouse), and the country-music style known as honky tonk
