Reggae

Reggae is a music genre first developed in Jamaica in the late 1960s.

While sometimes used in a broader sense to refer to most types of Jamaican music, the term reggae more properly denotes a particular music style that originated following on the development of ska and rocksteady. Reggae is based on a rhythmic style characterized by accents on the off-beat, known as the skank. Reggae is normally slower than ska. Reggae usually accents the second and fourth beat in each bar.

Reggae song lyrics deal with many subjects, including religion, love, sexuality, peace, relationships, poverty, injustice and other social and political issues.

Source : http://en.wikipedia.org/wiki/Reggae