‘One’ — U2
“One” was a spin-off from their 2nd single “Mysterious Ways” and their 3rd track on U2’s ‘Achtung Baby’ 1991 album. Tensions had nearly caused the band to split up before the improvisation of “One” succeeded. The song was written after the chord progress had inspired members that Edge’s guitarist played in the studio. Although the lyrics usually read “disunity,” they were differently understood. “One” is also a popular wedding song, but not what the band thought about.

‘One’ — U2