Crosby, Stills & Nash (CSN) are a folk rock/rock supergroup made up of David Crosby, Stephen Stills and Graham Nash, also known as Crosby, Stills, Nash & Young (CSNY) when joined by occasional fourth member Neil Young. They are noted for their intricate vocal harmonies, often tumultuous interpersonal relationships, political activism, and lasting influence on music and culture. By early 1968, Buffalo Springfield had also disintegrated over personal issues, and after aiding in putting together the band’s final album, Stephen Stills found himself unemployed by the summer.