The song peaked at number six on the Billboard alternative rock chart, making it the band's second top 10 single (the first being previous single "Prayer of the Refugee") and highest charting single from the album. The song has spent 30 weeks on the chart prior to this peak, making it the band's slowest climb to the chart's Top 10.In an interview with theredalert.com front man Tim McIlrath was asked if the instrumental part at the end of the song was originally a separate piece of music. He replied: "That one was actually pure collaboration. With a lot of our songs, Joe Principe will write the whole thing, or I'll write the whole thing, or Chris Chasse will write the whole thing, and then we'll all collaborate on little parts here and there. But 'The Good Left Undone' was really all 4 of us, Brandon Barnes included, all adding our own two cents." After the bridge of "Survive", the guitar part is that of the instrumental between "The Good Left Undone" and "Survive".