U2 are a rock band 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. By the mid-1980s, the band
had become a top international act. Their
success as a live act was greater than
their success as a record selling act until
their 1987 album The Joshua Tree, which,
according to Rolling Stone, elevated the
band's stature "from heroes to
superstars". U2 responded to the dance
and alternative rock revolutions and their
own sense of musical stagnation by
reinventing themselves with their 1991
album Achtung Baby and the Zoo TV
Tour. Since 2000, U2 have pursued a
more conventional rock sound that
retains the influence of their previous
musical explorations. U2 have sold more
than 145 million albums worldwide and
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.
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 and Bono's DATA (Debt, AIDS,
Trade in Africa) campaign.