James Brown's electric presence and on-a-dime bandleading added up to some of the greatest shows of the rock era, as evidenced by this playlist's live cuts. The grooves he laid down helped define the boundaries of hip-hop, and he immersed himself in the genre early; “Rapp Payback (Where Iz Moses?)” updates his smash “The Payback” for the post-disco era, and he teams up with New York rap legend Afrika Bambaataa on the percussive “Unity.”