Keith Richards, an English musician and composer who gained international recognition as the co-founder, guitarist, secondary vocalist, and co-principal songwriter of the Rolling Stones, was frequently referred to during the 1960s and 1970s as "Keith Richard." One of the most prosperous songwriting partnerships in history is his collaboration with Mick Jagger. His playing technique on the guitar has been a defining characteristic of the Rolling Stones throughout the course of the band's history, spanning more than six decades.