Crosby, Stills & Nash (later Crosby, Stills, Nash & Young) formed in 1968, uniting David Crosby, Stephen Stills, and Graham Nash as pioneers of the folk-rock movement. Known for their intricate vocal harmonies, socially conscious songwriting, and acoustic-driven sound, the trio helped define the countercultural spirit of the late 1960s and 1970s. Their debut album became an instant classic, influencing generations of songwriters and bands. Renowned for both their musical chemistry and individual artistry, they remain a cornerstone of American rock history.