Reggae is a broad term encompassing a related variety of musical styles that emerged from the island nation of Jamaica after 1960. These styles include ska, rock steady, reggae, and dancehall, all of which swept Jamaican music in distinct stylistic waves, one after the other, during the 1960s and 1970s. Musically, these styles share a common loping rhythm that accents the subsidiary beat. Reggae, however, is many things to many people. It can be seen as merely another great Caribbean dance rhythm, but at the same time many of its songs have highly political overtones. It is also often associated with the Rastafarian religion, an ascetic, millenarian sect that originated in part in the back-to-Africa teachings of Marcus Garvey in the 1920s and 1930s. Since its arrival on the world scene after 1960, reggae and its associated musical styles have become immensely popular around the world. It is one of...