Indeed.
The first lesson is the importance and rarity of sound, realistic judgment on foreign policy — above all in the use of military force. Washington Post columnist Max Boot is right that a big majority of the political class and population at large supported the Iraq War, but the implication is the opposite of what he claims. Far from being a difficult decision that was understandable at the time, this support betrays only that the American political class is suffused with morons and cowards.