Hair is a rock musical. The book and lyrics were written by James Rado and Gerome Ragni. The music was written by Galt MacDermot. It opened Off-Broadway in 1967, was revised, and premiered on Broadway at the Biltmore Theatre in April 1968. It ran for 1,750 performances. The musical is about drugs, sex, the Vietnam War, nudity, race, and other hot topics of the 1960s.