In about 30 seconds this morning on Fox News Sunday, George Will laid out the prudential case for proceeding very cautiously when contemplating a war:

WALLACE: So George, with that as trailer, what’s the lesson that we should take from Iraq, and particularly as it comes to future U.S. policy?

WILL: Four lessons, I think.

First, the government has to choose always on the basis of imperfect information. I agree with Bob [Woodward]. There were no lies here [in the Bush administration’s incorrect claims about WMD]. It was a colossal failure to know what we didn’t know.

Second, the failure to ask Admiral Yamamoto’s question. When he was asked by the government of Japan could he take a fleet stealthily across the Pacific and strike Pearl Harbor, he said yeah, but then what? He knew they would have on their hands an enormous problem in the United States.

Third, Colin Powell’s Pottery Barn rule: if you break it, you own it. Just as when the Kennedy administration in November 1963 was complicit in the coup against Diem, in South Vietnam, we owned South Vietnam ever after.

But fourth and most important, the phrase nation-building is as absurd as the phrase orchid building. Orchids are complex, organic things. So are nations. And we do not know how to build nations any more than we know how to fix English-speaking home grown Detroit.