Crass were an English art collective and punk rock band formed in Epping, Essex in 1977, who promoted anarchism as a political ideology, a way of life, and a resistance movement. Crass popularised the anarcho-punk movement of the punk subculture, advocating direct action, animal rights, feminism, anti-fascism, and environmentalism. The band used and advocated a DIY ethic in its albums, sound collages, leaflets, and films.

Punk rock is a music genre that emerged in the mid-1970s. Rooted in 1950s rock and roll and 1960s garage rock, punk bands rejected the corporate nature of mainstream 1970s rock music. They typically produced short, fast-paced songs with hard-edged melodies and singing styles with stripped-down instrumentation. Lyricism in punk typically revolves around anti-establishment and anti-authoritarian themes. Punk embraces a DIY ethic; many bands self-produce recordings and distribute them through independent labels.