Hardcore music, often referred to as hardcore punk, is a subgenre of punk rock that emerged in the late 1970s. It's characterized by its faster tempos, aggressive and raw sound, and often politically charged lyrics. Hardcore bands typically follow a traditional rock format but emphasize speed, intensity, and a do-it-yourself (DIY) ethic. The genre has spawned various subgenres and has been influential in the development of other musical styles, including metalcore and grunge. Hardcore scenes developed in various cities, particularly in the United States, and the genre remains a vibrant and evolving form of music.