This.
You mean, can't live without Americans?
HAHAHAHAHAHAHAHAAHAHAHA
No, no sorry, but everything will keep turning once the 500billion debt comes down from the skies and completely obliterates the US' economy. Canada will survive pretty easily, we'll just export/import across the pond, which by the way is allot economically better anyways. Everyone else across the pond is already doing just fine without much help from the US.
OK, first off, what does it mean when some one just says "This" after quoting a post? I see that a lot on the facepunch forums and I really can't figure out what it means. Is it like QFT?
As for the world just waltzing along it's merry way if the American economy collapses...ha ha ha.
300 million consumers, millions of businesses and crucial technology centers are all located in or a part of the US. That's why they call it a "Global Economy". The current financial crCIA is a perfect example of this; a few risky loans default in America and banks across the world go to stuff.
I'm not saying that America is the "best/most powerful" economic power in the world, there are several other countries that could qualify for that. However, the loss of America would be a substantial blow to the world.