“One” is a song by Irish rock band U2. It is the third track from their 1991 album Achtung Baby, and it was released as the record’s third single in March 1992. During the album’s recording sessions at Hansa Studios in Berlin, conflict arose between the band members over the direction of U2’s sound and the quality of their material. Tensions almost prompted the band to break up until they achieved a breakthrough by improvising “One”; the song was written after the band members found inspiration from a chord progression that guitarist The Edge composed. The lyrics, written by lead singer Bono, were informed by the band members’ fractured relationships and the German reunification. Although the lyrics ostensibly describe “disunity”, they have been interpreted in other ways.