Racionais MC's is a Brazilian hip hop group based in São Paulo. The original lineup formed in 1988 consisted of Mano Brown, Ice Blue, Edi Rock, and DJ KL Jay. Each member hails from the ring of favelas around São Paulo. Their lyrics combine themes of social justice with gangster imagery, a far cry from the idyllic breeziness typically associated with Brazilian rap music, Racionais Mc's is often considered the most important Brazilian rap group.