America’s post-World War II baby boom lasted from 1946 through1964, and produced over 76 million babies. Even before they became teenagers, fears about their impact surfaced. Social commentators, writers, and filmmakers all worried about growing rates of juvenile delinquency, underage drinking, rebellion against authority, and even clothing styles. Among all these concerns, nothing threatened the established order more than rock and roll. The music defined a new youth culture and marked a separation between generations.