Modern Rock, also known as alternative rock, emerged in the late 1970s as a reaction to the mainstream rock of the time. It's characterized by a broad spectrum of styles, but generally emphasizes a return to authenticity with less reliance on high production values. The genre gained significant commercial success in the 1990s and early 2000s with bands like Nirvana and Radiohead, who are noted for their innovative use of guitar distortion and introspective lyrics. This genre has significantly influenced contemporary music, both by pushing the boundaries of rock and by fostering a culture of independent music production.