When Hitler and Mussolini rose to power, antifascists organized to resist them. Now that populist demagoguery is surging and Trump is president, antifa is active around the world and recently opposed white supremacists in Charlottesville. Bray’s primer recaps the history of this vital movement, taking it from the 1920s to today. A historian of human rights, terrorism, and political radicalism in Modern Europe as well as one of the organizers of Occupy Wall Street, Bray has talked to antifascists in several different countries. He outlines the philosophy and tactics of groups including the Black Bloc, who believe that they are justified in using nearly any means to stop the alt-right message before it destroys democracy itself.