In 1962, Jerry Garcia met Ken Kesey, an author who would become a prominent figure in the 1960s counterculture movement. On December 4, 1965, Kesey and his group, the Merry Pranksters, hosted the ‘Acid Test’—an event marking the Grateful Dead’s first official appearance under their new name, in San Jose, California. The poster for the event featured the Dead alongside names like the Hells Angels, Allen Ginsberg, Neal Cassady, and more. According to Ken Babbs, a key collaborator in the Acid Tests