Nevermind — Nirvana

Nevermind detonated alternative rock into the mainstream, selling over 30 million copies worldwide and displacing hair metal from the charts within months of its 1991 release. Its raw production and visceral energy, channeled through anthems like 'Smells Like Teen Spirit,' caught a generational shift that the rock establishment—including runner-up Appetite for Destruction's polished sleaze—couldn't counter. Nevermind ended an era and birthed a new one, cementing its status as a watershed greater than any alternative release before or since.