Question for Truthers, Birthers, and other Conspiracy-Mongers: Why Assume Sinister Schemes When Corruption, Incompetence, Politics, Ideology, Greed, and Self-Interest Are Better Explanations?

When I was in college and first became active in politics and public policy, I periodically would meet people who warned about sinister conspiracies that had to be exposed and overcome. The most common villain, reviled by conspiracy theorists on the left and right,...