Mark Steyn is always a good read, so I recommend this link from Sadie (who else):
A Post-American Planet
Decline starts with the money, but it doesn’t stop there.
-everything in between-
America has had two roles in a so-called “globalized” world: America’s government was the guarantor of global order; America’s economy was the engine of global prosperity. Right now, both roles are up for grabs. And there are no takers for the former. Pace Nancy Pelosi, “life on this planet as we know it today” is going to change, and very fast.