Tere’s a simple theory underlying much of American politics. It sits hopefully at the base of almost every speech, every op-ed, every article, and every panel discussion. It courses through the Constitution and is a constant in President Obama’s most stirring addresses. It’s what we might call the More Information Hypothesis: the belief that many of our most bitter political battles are mere misunderstandings. The cause of these misunderstandings? Too little information — be it about climate change, or taxes, or Iraq, or the budget deficit. If only the citizenry were more informed, the thinking goes, then there wouldn’t be all this fighting.It’s a seductive model. It suggests our fellow countrymen aren’t wrong so much as they’re misguided, or ignorant, or — most appealingly — misled by scoundrels from the other party. It holds that our debates are tractable and that the answers to our toughest problems aren’t very controversial at all. The theory is particularly prevalent in Washington, where partisans devote enormous amounts of energy to persuading each other that there’s really a right answer to the difficult questions in American politics — and that they have it.