On the third anniversary of President Bush's Iraq debacle, it's important to consider why the administration so easily fooled so many people into supporting the war. I believe there are two reasons, which go deep into our national culture. One is an absence of historical perspective. The other is an inability to think outside the boundaries of nationalism. If we don't know history, then we are ready meat for carnivorous politicians and the intellectuals and journalists who supply the carving knives. But if we know some history, if we know how many times presidents have lied to us, we will...