A few generations from now...
Well I do not see us being a Superpower by any stretch of the imagination. Americans are just plain out of money, and the government cannot seem to comprehend that, but reality is reality and it will soon stop us by mere force. To that end our military might will stop in the same way that the USSR's did; they did not have the money to continue to build at the rate they needed too. We will be the same way. In the Reagan years they had a big pot of cash to steal from, and did via the big pool of money the baby boomers paid in to the Social Security System. It allowed us to build our military might up, and beat the Russians at the Cold War, but now we are paying the price for that as the birth rate fails to keep up with those taking in from the system with baby boomers retiring and the pot of social security money have been stolen, and my generation which feels they are entitled to everything.
As our super power influence continues to erode, and even more vile world will grow in power, particularly China. Its economy is growing at a staggering rate and its need for oil will surpass even ours. Since our morals are still strong, and we have stood up against human rights violations, as well as standing up for Israel, our own need for oil will strangle us as China makes packs with two strong opponents. The European Union which will realize part of itself is leaching off itself, will reunite with only ten strong members and have incredible influence in the world. Part of that is because they are not nearly dependent on oil as the rest of the world is, though granted they will still need some for its own formidable war machine.
At the same time, Russia, with its own well stocked supply of oil will become a superpower again unfortunately. With a powerful thirst for oil, China will make packs with Russia; for its oil and strength which will be needed to gain the oil reserves that the middle east has. And those reserves are stout; for instance Iraq has only 2000 well heads driven into its reserves while in comparison Texas has over a million. And Iran has huge reserves that are not only largely untapped, but uncharted as well...they stand on top of a lot of oil...oil a thirty world will need. Without question the middle east will be of interest to everyone; from the North, from the east and even from the south as Egypt and Libya; with their smaller amounts of oil reserves hope to gain more influence on the national stage.
Ultimately the quest for the oil stems from a quest for power, because oil will run the military machine. Even if we were to start gearing up our military for nuclear readiness, it would take decades to replace the oil powered military equipment that exists today. Russia, with its military know how and own oil reserves will trade what it does have, for what it does not have: food. This will most likely come from China who have the land reserves and people to run a military of size and be able to feed them. As is, with their form of National Guard, they have a two million person Army; which is a number with incredible significance.
All this will be a quest for power and no doubt be centered where the money is: the middle east. Naturally the World Bank will be centered there and will ultimately deal out cash to the rest of the world. Welcome to the one world order.