Crosby, Stills, Nash & Young (CSNY) is one of the most iconic folk rock supergroups of the 1960s and 1970s. The band was made up of David Crosby (formerly of The Byrds), Stephen Stills (formerly of Buffalo Springfield), Graham Nash (formerly of The Hollies), and later Neil Young (also from Buffalo Springfield). Their combination of harmonies, political lyrics, and blending of folk, rock, and country influences helped define the sound of the era.