57. "Sweet Black Angel" (1972)
A tribute to Angela Davis, the Black Panther who was jailed for murder in 1970, this ballad is the band's most activist moment. Jagger sings, "Free the sweet black slave," framed by acoustic guitars, backwoods harmonica and a touch of calypso lilt. It may also be Jagger's least campy, most convincing country-folk performance.