Gregory Regis Ginn is an American musician and songwriter, best known for being the leader, primary songwriter, and the only continuous member of the hardcore punk band Black Flag, which he founded and led from 1976 to 1986, and again in 2003. The band announced another reunion in 2013. Since the breakup of Black Flag, Ginn has recorded solo albums, and performed with such bands as October Faction, Gone, Confront James, Mojack, and others. He was 99th on Rolling Stone's list of "The 100 Greatest Guitarists of All Time".

Hardcore punk is a punk rock music genre and subculture that originated in the late 1970s. It is generally faster, harder, and more aggressive than other forms of punk rock. Its roots can be traced to earlier punk scenes in San Francisco and Southern California which arose as a reaction against the still predominant hippie cultural climate of the time. It was also inspired by Washington, D.C., and New York punk rock and early proto-punk. Hardcore punk generally disavows commercialism, the established music industry and "anything similar to the characteristics of mainstream rock" and often addresses social and political topics with "confrontational, politically charged lyrics".