This was one of the last songs written by Imagine Dragons frontman Dan Reynolds for the band's Smoke And Mirrors album. "I came home from tour with my head spinning and decided to run away for a bit to the west coast and reflect/write about the last couple years," he told Billboard magazine. "If you listen closely to the sample of me whistling into my laptop by the ocean, you can hear a wave that crashed while I was recording it. I loved the take because it seemed to crash perfectly in time. It takes me back to that spot every time I hear the song."
Dido helped shut down a Neo-Nazi Web site after learning it was using "White Flag" to promote its hateful messages. Owners of the site had misinterpreted the track as racist and thought they represented their white supremacy views.