“This Ain’t a Scene, It’s an Arms Race” is a song by American rock band Fall Out Boy and the lead single from their commercially successful third studio album Infinity on High (2007). The music was composed by vocalist and guitarist Patrick Stump and the lyrics were penned by bassist Pete Wentz, following the band’s songwriting approach which first began with some songs on their 2003 album Take This to Your Grave. Production was handled by Neal Avron, who also produced the band’s previous From Under the Cork Tree album.
The track was a commercial success and the band’s major international breakthrough. “This Ain’t a Scene, It’s an Arms Race” debuted and peaked at No. 2 on the US Billboard Hot 100 with 162,000 first week sales and broke various records.