News flash Grunherz you can't say a word about Saddams alledged WMD before they're found. So, no, I'm not even distantly worried about things that probably weren't there nor were even targeted at me in any way even if they did exist.
Russias economy was shattered after WW2, and US had a major part to the whole country surviving Hitler's assault in the first place. They were struggling to survive which is hardly a position to start wageing another war.
As what goes with your idea of U.S. saving the world with the marshall plan, as in the recent article posted in another thread, finland is a good example of surviving without a dime of marshall money - and paying the war retributions in full while doing so.
What makes you think way larger countries couldn't pull off the same?