One is considered one of U2's best songs, released in 1991 as the third single from their album Achtung Baby. The song is a powerful and emotional ballad that addresses themes of unity, hope, and the human condition. With its haunting guitar riff, soaring vocals, and thought-provoking lyrics, One has become an anthem for many fans around the world. The song's message of coming together and finding common ground resonates with listeners of all backgrounds and has made it a timeless classic in U2's discography.