This is one of U2’s more recent albums as it was released in 2014. U2 looks back on their past and reflects on their “loss of innocence” along their journey as a band. It seems that as they are all now much older than when they first started the band and with families of their own, they are able to look back longer and look at the change they’ve gone through over the years.
The album cover shows Larry Mullen shielding his son whose face is hidden. In a way, it seems to be representing Mullen shielding his son probably from the “horrors 0f the world” in an attempt to protect his innocence which they talk address heavily through this album. The tattoo on his shoulder is also based on a Pawnee Nation symbol that represents the protection of innocence.