If there was anything we learnt from McCarthyism, it is that compiling lists of our political foes is a malevolent, nefarious, and incredibly dangerous thing to do. But this terrible tactic to simplify and reduce our political opponents to a Rogue’s gallery of “bad guys,” is not solely the domain of the right-wing. As the political horseshoe theory attributed to Jean-Pierre Faye highlights, if we travel far-left enough, we find the very same sneering, nasty and reckless bully-boy tactics used by the far-right. The two extremes of the political spectrum end up meeting like a horseshoe, at the top, which to my mind symbolizes totalitarian control from above. In their quest for ideological purity, Stalin and Hitler had more in common than modern neo-Nazis and far-left agitators would care to admit.