EDIT: looks like I might be wrong.
America has long been the worlds only super power, now they may have not always done the right thing but they tried and so did we (UK) and that counts for something in my books. It might not be too popular but I'm glad we are one of the countries that actually chooses to do something rather than be like, for example France or Russia who are all too happy to pocket bribes in exchange for vetoing UN action. But alas, my despair when I think about the UN is a subject for another day, or is it? No? Ok, I hate the UN! The most powerful countries in our world, millions of people united together and what do we do? Sit around and talk about the issues and avoid actually doing anything at all - doesn't help you have corrupt countries with their own agenda as well.
Anyway, got a little side tracked. America, the world only super power and proclaimed world police are failing. You can't run a super power, run two wars and deal with a financial crisis - it's impossible and America has proved this. 70 trillion dollars in debt, a number which is barely even comprehensible, as, put it this way, if you withdrew that from an ATM, 1) you would be waiting for years for it all to come out the machine and 2) If you wanted to count and see if you got given the right amount you would spend your whole life doing that.
America can no longer afford two wars, it must and will pull back. America will lose it's reach of power and will no longer be a super power. What will happen then? As always, when a leader is removed there will be a rush as other would be leaders who have suffered under the boot try to take his place and if history can teach us anything it's that the benefactor is usually worse.
Who will rise to the challenge then? Probably China and who knows, in 100 years the west might be a whole lot different.