Peace Is the Only Answer on Foo Fighters' Emotional 'Waiting on a War': Watch the Video

Grohl dedicated the song to Harper, who he said, "deserves a future, just as every child does."

The pain, fear and hope Grohl talks about feeds the song's simple, but high-impact lyrics, which open with the lines, "I've been waiting on a war since I was young/ Since I was a little boy with a toy gun/ Never really wanted to be number one/ Just wanted to love everyone," which tumbles into the affecting chorus, "Is there more to this than that? (x3)/ Is there more to this than/ Just waiting on a war?"

The four-minute Greg Kurstin-produced song, which features acoustic guitar, strings and subtle bass and drums, picks up the pace and intensity as it moves through a second verse about waiting for the sky to fall and scenes of a little boy lost turning to the radio for solace. The final minute of the track then explodes into a patented Foos rager, as the languid pace triples up and the song charges to a frenzied, cathartic conclusion.

"War" is the third track the band has released from the nine-track, 37-minute album so far, following on the heels of "No Son of Mine" and "Shame Shame. Medicine at Midnight is due Feb. 5.

Watch the video for "Waiting on a War" below.

This article has been updated.