Roosevelt didn't want a WW3.
The League of Nations had failed largely because the U.S. refused to support it (although also for many other reasons) so that when Fascist Italy and Nazi Germany flouted the League it didn't have the muscle to stare them down.
At the end of WW2 the US was by far the most powerful nation on earth because we had grown during the war while every other major player had been beaten to a pulp (even the victors) and because only we had nuclear weapons. The Soviet Union was clearly going to become the other greatest power, and would inevitably acquire nuclear weapons. Their tanks and ours were sitting across an invisible (for then; soon it would become the Iron Curtain) line from each other across Europe. A credible international forum for settling disputes before they could escalate was desperately needed.
Great Britain A+
United States has the strongest military in the world.
The United States is a major producer of Agricultural Products... The United States feeds the world so i guess you could say the United States produces life?
It went from a great power to an isolationist nation, much like Japan
It proved that nation was strong. That even though this nation just got out of a horrific civil war, that now this nation is strong; basically the US prove to the world that its no longer a little country, it proved to the world that its their turn to be world powers. For the first time in world history a citizen didn't name themselves after a state or a city or a kingdom, but now an American. The American states were no longer divided. But they have became the United States of America.
the united states became the largest creditor nation in the world
United States
United States
United states
United Nation comprise of a membership from almost all the states of the world. UN has different slogans for their different programs. One of the main slogan is "United for Peace".
Japan
United States
It has the most leverage and power so it calls the shots on this planet. The United States is considered to be the most powerful nation politically in the world.
The most advanced nation in world war 2 was probably the united states.
Japan
The United States and The USSR.
Germany.