The infamous late 19th-century book Might is Right has secured a unique place in the literature of extremism. Unlike so many utopian manifestos of the day, the bombastic yet lyrical text attributed to Ragnar Redbeard (a pseudonym) sought to upend all egalitarianism, all theism, and all political idealism. Such sacrosanct values were, by Redbeard's stentorian decree, swept into the garbage bin-to be replaced with the singular...