was an English anarcho-punk collective formed in 1977, known for fusing raw punk aggression with radical politics, DIY ethics, and provocative multimedia art. Their fiercely anti-authoritarian stance, communal living, and self-released records helped define the anarcho-punk movement. Through abrasive music, polemical lyrics, and striking visual work, Crass became one of the most influential and uncompromising voices in punk culture.