When Rush's two 1975 albums, Fly By Night and Caress of Steel, failed to find a mass audience, their label wanted them to record something more commercial. Knowing its entire career was on the line, the band decided to double down on its sound by crafting the crazily ambitious 2112. The 20-minute title track is about life in a version of 2112 where music has been banned following an interplanetary war. Without any doubt, it's one of the most cherished compositions in the history of prog rock. Rush can't get offstage without playing at least a little bit of it. When they were inducted into the Rock and Roll Hall of Fame, they played the first segment with members of the Foo Fighters, who were dressed up like Rush from that time period.