A compelling argument, but it assumes no Korea, no VietNam, and no Persian Gulf, part 1 (technically a "police action.")
There is an historical argument that the U.S. always fights the previous war. WWII was fought based on the lessons learned during (mostly after) WWI about appeasement and secret alliances. Korea was fought in an attempt to prevent another incarnation of WWII. VietNam, like Korea, was a product of the Cold War mentality, but the way in which it was fought hinged on lessons learned in Korea, mainly the stuff about "winning hearts and minds." Many would argue that the current war on terror is a way of compensating for the losses suffered in VietNam and re-asserting our cultural and moral superiority in the world.
I think the parallels with VietNam are important, but should not be overstated. I see the war on terror as the new Cold War. There were a number of issues during the Cold War era that presidents of both parties grappled with, and which GWB and his successors (whoever they may be) will have to grapple with. For one, how do you fight an ideology? For another, how do you oppose groups through military force when those groups are adept at (and prefer) non-military tactics?
I should state for the record that IANAMH (I am not a military historian). I don't know the details of every battle fought on foreign soil. My studies tend towards the cultural and occasionally the political, but insofar as foreign policy has an impact on domestic life, the United States' place in the world has changed significantly since WWII. I think there was for many years a sense that "we" -- Americans, the unit -- would always be the men in white hats, but I think VietNam, Watergate, Iran-Contra, and however many other deceptive, immoral, or just downright evil actions perpetrated by our government have changed that. Maybe I'm a cynic, or maybe I'm naive, but I don't think people had the same faith in government even six years ago that they had sixty years ago.
They certainly had plenty of faith in the thirties when Roosevelt all but handed us over to the commies.
But you don't have to take my word for it.*
*I heard Jonathan Alter speak last night at school. He was pretty fascinating and I was a total fangirl. So buy his book. It's awesome.