For almost as long as it’s existed, heavy metal has been used as protest music. On Black Sabbath’s Paranoid, the first thing you’re barraged with is War Pigs: a seven-minute savaging of the politicians who instigated the Vietnam war. Iron Maiden once had their mascot, Eddie, murder Margaret Thatcher on a single’s artwork; Metallica and Megadeth spent the 1980s lambasting cold war superpowers that didn’t know whether to shake hands or nuke each other.
