The problem with being the only Superpower has its own problems....as Tuk opines.
Throw in the changes in Government we go through every four to eight years depending upon who wins the National Election and one can understand the confusion that can bring to International politics.
If the Chinese are genuinely smart they shall beat us by means of Trade and Industry....and really cheap labor.
But...they too shall have to be very careful in managing their own growth and domestic financial situation.
For now the Russian Bear has had its claws trimmed...but over time they too can become a major player in the World Markets....especially if they get a lock on the energy supply to Western Europe.
We have to be looking way into the future when negotiating current deals....such as the pipelines from Russia to the West while stopping new pipelines between Candada and the USA.