For 2014's Songs of Innocence, U2 created a concept album based on their experiences growing up in Dublin. "We wanted to make a very personal album," Bono told Rolling Stone. "Let's try to figure out why we wanted to be in a band, the relationships around the band, our friendships, our lovers, our family. The whole album is first journeys – first journeys geographically, spiritually, sexually. And that's hard. But we went there." "Volcano," which kicks off with a throbbing bass hook written by the Edge, taps the anger Bono felt as a teenager until he joined his band. "You were alone," he sings. "But now you are rock & roll."