ROCK
Rock is a broad genre of popular music that originated in the early 1950s in the United States and evolved into a wide range of different styles during the mid-1960s and later, particularly in the United States and the United Kingdom. Chronology and evolution of rock Late 1940s–mid-1960s Rock and roll Pop rock and instrumental rock Surf music Mid-1960s–early 1990s British rock Garage rock Blues rock Folk rock Psychedelic rock Progressive rock Jazz rock The 1970s Roots rock Glam rock Chicano rock Soft rock, hard rock, and early heavy metal Christian rock Heartland rock Punk rock Early 1990s–late 2000s Grunge Britpop Post-grunge Indie rock Alternative metal, rap rock and nu metal Digital electronic rock Finally, from the 2000s onwards, rock began to decline and other musical genres such as pop and hip hop became the most listened to music.