At a time when rock music was evolving away from the forces that had made it possible in the first place, Creedence Clearwater Revival brought rock back to its roots with a concise synthesis of rockabilly, swamp pop, R&B, and country. Although the band's tight, punchy arrangements were a group effort, their vision belonged to singer, songwriter, guitarist, and leader John Fogerty. Fogerty's classic compositions for Creedence evoked enduring images of Americana, and they simultaneously reflected burning social issues of the day.