By the time the Rolling Stones began calling themselves the World’s Greatest Rock & Roll Band in the late ’60s, they had already staked out an impressive claim on the title. As the self-consciously dangerous alternative to the bouncy Merseybeat of the Beatles in the British Invasion, the Stones had pioneered the gritty, hard-driving blues-based rock & roll that came to define hard rock.

https://www.allmusic.com/artist/the-rolling-stones-mn0000894465/biography