The Decline of Western Civilization is a 1981 American documentary filmed through 1979 and 1980. The movie is about the Los Angeles punk rock scene and was directed by Penelope Spheeris. In 1981, the LAPD Chief of Police Daryl Gates wrote a letter demanding the film not be shown again in the city.

Since the mid-1970s, California has had thriving regional punk rock movements. It primarily consists of bands from the Los Angeles, Orange County, Ventura County, San Diego, San Fernando Valley, San Francisco, Fresno, Bakersfield, Alameda County, Sacramento, Lake Tahoe, Oakland and Berkeley areas.