Out of the East Bay punk scene in Berkley, California, Green Day emerged in 1987 when teenage friends Billie Joe Armstrong and Mike Dirnt started making noise together under the name Sweet Children. After recruiting drummer Tré Cool in 1990, the classic lineup was locked in and the band hit the ground running with a sound rooted in the stripped-down energy of the Ramones and the Buzzcocks but filtered through their own suburban California restlessness. Their early work on the indie label Lookout Records built a devoted following before they made the jump to a major.
The 1994 release of Dookie was the kind of record that genuinely shifts culture. It brought punk-pop into mainstream America with hooks sharp enough to cut glass and an attitude that resonated with a generation of disaffected kids. Albums like Nimrod and Warning kept them relevant, but it was the 2004 rock opera American Idiot that cemented their legacy as something more than a nostalgia act. That record took direct aim at the Bush era and gave the band a second life as politically charged arena rockers.
Green Day's influence on the pop-punk genre is almost impossible to overstate. Entire waves of bands owe their careers to the blueprint Armstrong and company laid down, and their ability to evolve without losing their core identity is genuinely rare in rock.