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Rock music is a popular music genre that emerged in the mid-20th century, characterized by electric guitars, strong rhythms, and often performed by bands. It has become one of the most influential and widespread musical styles in modern culture, shaping both the sound of contemporary music and the attitudes of listeners worldwide.
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Rock music is a genre of popular music that originated in the United States as "rock and roll" in the late 1940s and early 1950s, developing into a range of styles from the late 50s to mid-1960s, primarily in the United States and United Kingdom. It has its roots beginning as classic rock and roll, a style that drew from the African-American musical genres of blues and rhythm and blues, as well as from country music. Rock also drew strongly from genres such as electric blues and folk, and incorporated influences from jazz and other styles. Rock is typically centered on the electric guitar, usually as part of a rock group with electric bass guitar, drums, and one or more singers.
Usually, rock is song-based music with a 4 time signature and using a verse–chorus form; however, the genre has become extremely diverse. Like pop music, lyrics often stress romantic love but also address a wide variety of other themes that are frequently social or political. Rock was the most popular genre of music in the U.S. and much of the western world from the 1960s up to the 2010s.