Baba O'Riley is a song by the English rock band The Who, released in 1971. It was written by Pete Townshend and is the opening track to the band's studio album Who's Next. The song is known for its synthesizer introduction and the chorus line 'Teenage Wasteland'. The title of the song is derived from the combination of the names of two of Townshend's philosophical and musical influences: Meher BABA and Terry Riley.