Jamaica's extraordinary musical legacy, from ska to dub, Bob Marley.The earlier genres ska and rocksteady. Reggae usually relates news, social gossip, and political comment. Reggae spread into a commercialized jazz field, being known first as ‘Rudie Blues’, then ‘Ska’, later ‘Blue Beat’, and ‘Rock Steady’. It is instantly recognizable from the counterpoint between the bass and drum downbeat, and the offbeat rhythm section. The immediate origins of reggae were in ska and rock steady; from the latter, reggae took over the use of the bass as a percussion instrument.