Jamaican popular music that developed in The1960s among Kingston's poor blacks, drawing on soul music and traditional African and Jamaican folk music and ska music. Many of its highly political songs proclaim the tenets of the Rastafarian religious movement. Instrumentation usually includes an ensemble of organ, piano, drums, and electric guitars, led by a electric bass guitar played at high volume. Springy, offbeat rhythm characterizes its sound. It is popular internationally and has influenced African music. Bob Marley and his group, the Wailers, and Toots and the Maytals are among the best-known performers.