Page 2 USA China
I am not sure if they are either stabilizing or destabilizing. They seem more like the employee that isnt exactly happy, but doesnt know what they want to do with their life. To some degree, the world stability was better when they were very isolated. Much like the balkans were more "stable" when Tito was in charge. However, these regimes do some very bad things to the people within.
With all that said, the US will not be able to remain on top forever. History has taught us this well. If the cycles are correct for empires, the US has another approximate 50 years. China with its growing power could easily end up taking its place.
I do not see China remaining Communist for too long. The capitalism virus has spread too far and there will be no turning back and this is a good thing for the people. My only question will be wether or not it takes a civil war to complete the transformation from Communism to something else. If it is a civil war, they definitely will not be a stabilizing force. If it is a bloodless transformation, they could easily end up being the top world power. Either way, China will certainately be a force in the world for years to come.
Just a thought,