A study funded by the US government has concluded that conservatism can be explained psychologically as a set of neuroses rooted in "fear and aggression, dogmatism and the intolerance of ambiguity". As if that was not enough to get Republican blood boiling, the report's four authors linked Hitler, Mussolini, Ronald Reagan and the rightwing talkshow host, Rush Limbaugh, arguing they all suffered from the same affliction. All of them "preached a return to an idealised past and condoned inequality". Republicans are demanding to know why the psychologists behind the report, Political Conservatism as Motivated Social Cognition, received $1.2m in public...