Crust punk (often simply crust) is one of the evolutions of anarcho-punk and hardcore punk, mixed with extreme metal guitar riffs. The style, which evolved in the mid-1980s in the UK, often had songs with dark, pessimistic lyrics, lingering on political and social ills. It is typically played at a fast tempo with growled and screamed vocals and anarchist lyrics. Notable crust punk bands include Amebix, Antisect, and Doom.