watch out for CHINA, no other country has anywhere near the population, nor the revenues that China is accumulating. the next war may not be a war of the military but a war of crippling a nations economy and stealing data/secrets/intellectual property.
While everyone is watching the arab spring, Iraq, Afganistan, the europe debt crisis, CHINA is the sleeper that is on it's way to become a military and econmoic powerhouse. They are already flexing their muscle with loaning money to the world.
Look at it this way, after world II, who held most of Great Britains debt? It was the US, when Great Britain wanted to dicate policy in the late fourties in the middle east, it was the US who had leverage over Great Britain because of the debt that we held. The same is true of China and they will act in their best interest and dictate policy to those debtors.