U2

U2 are an Irish rock band formed in Dublin in 1976. The group comprises Bono (lead vocals), the Edge (lead guitar, keyboards, and vocals), Adam Clayton (bass guitar), and Larry Mullen Jr. (drums and percussion). Initially rooted in post-punk, U2's musical style has evolved throughout their career, yet has maintained an anthemic quality built on Bono's expressive vocals and the Edge's chiming, effects-based guitar sounds. Bono's lyrics, often embellished with spiritual imagery, focus on personal and sociopolitical themes. Popular for their live performances, the group have staged several elaborate tours over their career.

The band was formed when the members were teenaged pupils of Mount Temple Comprehensive School and had limited musical proficiency. Within four years, they signed with Island Records and released their debut album, Boy (1980). Works such as their first UK number-one album, War (1983), and singles "Sunday Bloody Sunday" and "Pride (In the Name of Love)" helped establish U2's reputation as a politically and socially conscious group. Their fourth album, The Unforgettable Fire (1984), was their first collaboration with producers Brian Eno and Daniel Lanois, whose influence resulted in a more abstract, ambient sound for the band. By the mid-1980s, U2 had become renowned globally for their live act, highlighted by their performance at Live Aid in 1985. Their fifth album, The Joshua Tree (1987), made them international stars and was their greatest critical and commercial success. One of the world's best-selling albums with 25 million copies sold, it yielded the group's only number-one singles in the US: "With or Without You" and "I Still Haven't Found What I'm Looking For".

Facing creative stagnation and a backlash to their documentary and double album Rattle and Hum (1988), U2 reinvented themselves in the 1990s. Beginning with their acclaimed seventh album, Achtung Baby (1991), and the multimedia spectacle of the Zoo TV Tour, the band pursued a new musical direction influenced by alternative, industrial, and electronic dance music, and they embraced a more ironic, flippant image. This experimentation continued on Zooropa (1993) and concluded after Pop (1997) and the PopMart Tour, which polarized audiences and critics. The group re-established a more conventional, mainstream sound on All That You Can't Leave Behind (2000) and How to Dismantle an Atomic Bomb (2004), which were critical and commercial successes. Sales of subsequent albums declined, but the group remained a popular live act. The U2 360° Tour of 2009–2011 held records for the most-attended and highest-grossing concert tour until 2019. Songs of Innocence (2014), the first of two companion albums in the 2010s, was criticized for its pervasive release through the iTunes Store. In 2023, U2 released Songs of Surrender, an album of re-recorded songs, and began the U2:UV Achtung Baby Live concert residency to inaugurate Sphere in the Las Vegas Valley.

U2 have released 15 studio albums and are one of the world's best-selling music artists, having sold an estimated 150–170 million records worldwide. Their accolades include 22 Grammy Awards, eight Brit Awards, four Ivor Novello Awards, and two Golden Globe Awards. They were inducted into the UK Music Hall of Fame in 2004 and the Rock and Roll Hall of Fame in 2005. According to Pollstar, they were the second-highest-grossing live music artist from 1980 to 2022, earning US$2.13 billion. Rolling Stone ranked U2 at number 22 on 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, working with organizations and coalitions that include Amnesty International, Jubilee 2000, DATA/the ONE Campaign, Product Red, War Child, and Music Rising.