Conservatives would have us believe that they hold a monopoly on common sense. Rush Limbaugh, Sean Hannity, Bill O’Reilly, and many other right-wing rabble-rousers regularly portray themselves as defenders of the good, old-fashioned common sense of average Americans against an out-of-touch liberal elite. A growing cadre of ambitious politicians likewise aims to lead a crusade in the name of “commonsense conservatism.” Glenn Beck has even gone so far as to publish a runaway bestseller that explicitly piggybacks on Thomas Paine’s Common Sense to argue against the danger of “out-of-control government” and the forces of organized foolishness that would foist it on the American people.

The unanimity is impressive. But it is also ridiculous. The fact is that the right’s appeal to common sense is nonsense. Unfortunately, though, it is a form of nonsense with deep roots in the American past and a very long history of political potency. Whether it continues to prove effective in the future will depend in no small measure on how cogently the rest of America responds.

On the advice of my physician, I do not watch or listen to Glenn Beck, preferring to follow his exploits via the serial bouts of hysteria he inspires in his fans. So it was news to me to learn that he spends a lot of time hawking the works of the late W. Cleon Skousen, an extremely sketchy right-wing character who lived on the far fringes of the conservative movement and of Mormonism.

In a fascinating piece on the subject in Salon today, Alexander Zaitchick explores Beck's near-apostolic advocacy of Skousen's work, which serves as a sort of intellectual framework for the highly paranoid worldview of the Tea Party movement that Beck has done so much to promote. In his very colorful career, which earned him a big fat "dangerous extremist" file with his former employers at the FBI, Skousen gained most notice in the early 60s as a fellow traveler and stout defender of the John Birch Society (after Birch founder Robert Welch had been read out of the conservative movement for contending that Dwight D. Eisenhower was a communist).