Nirvana’s sculpted symphony of reckless guitar, bass, and drums nailgunned to some of the most oblique yet thoughtful lyrics of all time ushered in the alt-rock nation. “Smells Like Teen Spirit,” “Come As You Are,” “In Bloom,” “Lithium,” and “Breed” are corrosive anthems that ignited a movement, slammed shut a decade of excess, and catapulted the underground into the mainstream.