In 1971, Marvin Gaye released what many consider to be his masterwork, “What’s Going On?” By November of the same year, Sly Stone, who died this week, seemed to pose an answer: “There’s a Riot Goin’ On.” The idealism of the 60s was dead, and with its death came the harsh realities of the new moment: political assassinations, expanded police violence, a shifting civil-rights movement, and a sense of disillusionment that seemed to haunt Stone as he searched for a purpose beyond hippie-culture stardom. The lyrics on “Riot” were not necessarily pessimistic, and they were not all explicitly political, but they were tinged with a kind of cynicism that seemed to be overtaking the country. “It would be easy to draw parallels with our current political moment,” Hanif Abdurraqib writes. “It would be easy to tell you that I had the N.B.A. Finals on my television the other night but hardly watched the first half because I was frantically scrolling the internet, trying to keep track of the re...