Alternative rock and grunge emerged in the mid-1980s as a reaction against mainstream rock's commercialization. Influenced by punk's DIY ethos and hard rock's raw sound, these genres blended distorted guitars, introspective lyrics, and unconventional song structures. Nirvana, Pearl Jam, and Soundgarden became the face of grunge, reflecting Generation X's disillusionment. The genre's raw sound, thrift store fashion, and themes of alienation resonated with youth culture, ultimately reshaping the music industry and popular culture of the 1990s.