Crass was an English anarchist punk rock band, formed in 1977 and based around Dial House, an open house community near Epping, Essex.
Whereas the Sex Pistols might have mentioned 'anarchy' for shock value (thereby furthering the common misconception that it is simply a synonym for chaos), Crass actually promoted genuine anarchism as a legitimate political ideology, way of living, and as a resistance movement, popularizing the seminal peace punk movement and touching on such overtly far left political issues as anti-consumerism, direct action, animal rights, feminism, anti-war, anti-corporatism, environmentalism, LGBT rights, anti-globalization, reproductive rights, anti-racism, squatting, and the separation of church and state.
Taking literally the punk manifesto of "Do It Yourself", Crass combined the use of sound collage, graphics, song, film, and subversion to launch a sustained and innovative critical broadside against all that they saw as a culture built on foundations of war, violence, sexism, prejudice, capitalism, religious hypocrisy and unthinking consumerism. They were also critical of what they perceived as the flaws of the punk movement itself, as well as wider youth culture in general. Crass were amongst the progenitors of the anarcho-pacifism that became common in the punk music scene (see also anarcho-punk).