U2 are a rock band that formed in Dublin, Ireland. The band consists of Bono (vocals and guitar), The Edge (guitar, keyboards, and vocals), Adam Clayton (bass guitar), and Larry Mullen, Jr. (drums and percussion). The band formed in 1976 when the members were teenagers with limited musical proficiency, but by the mid-1980s, the band had released several albums and become a top international act. Their success as a live band was greater than their success at selling records until their 1987 album The Joshua Tree, which, according to Rolling Stone, elevated the band's stature "from heroes to superstars". In the 1990s, U2 responded to the dance and alternative rock revolutions and their own sense of musical stagnation by reinventing themselves with the album Achtung Baby and the accompanying Zoo TV Tour. Since 2000, U2 have pursued a more conventional rock sound that retains the influence of their previous musical explorations. U2 have released 12 studio albums, with worldwide sales totaling 145 million records, and they have won 22 Grammy Awards, more than any other band. In 2005, the band were inducted into the Rock and Roll Hall of Fame in their first year of eligibility. Rolling Stone magazine listed U2 at #22 in its list of the 100 greatest artists of all time. Throughout their career, as a band and as individuals, they have campaigned for human rights and social justice causes, including Amnesty International, the ONE Campaign, (RED), and Bono's DATA (Debt, AIDS, Trade in Africa) campaign.
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