Decades after his murder, Tupac Shakur's influence looms large over rap. The thug life anthems of Southern rappers like Lil Boosie, the soulful social conscience of Kendrick Lamar and the provocatively profane rhymes of Lil Wayne and DMX all owe a debt to Pac's voluminous and complex catalogue. And his distinctive cadences are reflected in the flows of stars like Master P.