Punk rock originated in the United States between 1974-1976 as a rebellion against mainstream rock music. It featured anti-establishment lyrics and DIY distribution of music. Iconic early punk bands like the Ramones and Sex Pistols helped spread the genre internationally in the 1970s. Punk fashion emerged as part of the movement's rebellious spirit and included ripped clothes, combat boots, and dyed hair. Punk subgenres like post-punk and riot grrl also addressed political issues through their music in following decades.