United Mutation was a punk rock band formed in 1979 in Los Angeles, California. The band was composed of singer/guitarist Keith Morris, guitarist Greg Hetson, bassist Mike Watt, and drummer Chuck Dukowski. United Mutation is considered to be one of the first hardcore punk bands, and their music was characterized by its fast tempos, aggressive lyrics, and distorted guitars.
The band was formed after Morris and Watt left the seminal punk band Black Flag. They recruited Hetson and Dukowski, who had both played in local punk bands, and the four of them began playing shows in the Los Angeles area. United Mutation quickly gained a reputation for their intense live performances, and they soon became a popular draw on the local punk scene.
In 1980, the band released their debut album, "United Mutation." The album was a critical and commercial success, and it helped to establish United Mutation as one of the leading bands in the hardcore punk movement. The band toured extensively in support of the album, and they played shows with other notable hardcore bands such as Black Flag, the Dead Kennedys, and Fear.
In 1981, United Mutation released their second album, "Eatin' Dust." The album was not as well-received as their debut, and it failed to chart. The band continued to tour, but they eventually broke up in 1983.
After the breakup of United Mutation, Morris went on to front the hardcore band the Circle Jerks, Hetson and Watt formed the alternative rock band Minutemen, and Dukowski formed the punk band Würm.
United Mutation is considered to be one of the most important bands in the history of hardcore punk. Their music was influential on many later punk bands, and they helped to define the sound of the genre. The band's legacy continues to live on today, and their music is still enjoyed by fans of punk rock around the world.