Grateful Dead, "Uncle John's Band" (1970)
The drift in popularity from AM to FM radio during the Seventies eroded the mass audience upon which pop hits depended. Hippies and fellow travelers could increasingly be found glued to free-form FM stations, and no underground hit glowed quite as mysteriously as the opening track on Workingman's Dead, a sepia-tinted declaration of the Grateful Dead's newly expert vocal harmonizing. The suggestion to "come hear Uncle John's Band," according to lyricist Robert Hunter, is nothing less than "the coaxing and cajoling of the forces of generational unity." When the single was dropped from the airwaves for cursing "Goddamn, well I declare/Have you seen the like?" it only confirmed every subterranean's conspiracy theories.