How “There’s a Riot Goin’ On” helped the musician find a purpose beyond hippie-culture stardom. In his fight against Black erasure, the Roots drummer, who has amassed two hundred thousand LPs (plus ...

Isaac Hayes’s legacy remains elusive. Even now, over a decade after the singer’s death, there is still no biography of him. Younger fans might remember him chiefly as the voice of Chef on “South Park, ...