It begins with a painful realization about the United States: We can’t be the country those Iraqis wanted us to be. We lack the wisdom and the virtue to remake the world through preventive war. That’s why a liberal international order, like a liberal domestic one, restrains the use of force–because it assumes that no nation is governed by angels, including our own. And it’s why liberals must be anti-utopian, because the United States cannot be a benign power and a messianic one at the same time.

Exactly.