QUOTE(IronGhost @ Jun 19 2007, 11:11 AM)

Ah, my friend Rambo is back with another one of his questions. (I wonder if he's writing another paper, and is tricking the troops at UM into doing a lot of the work again?) (( Just kidding, Rambo! ))
You ask a question that is so complex, providing a bried and simple answer is all but impossible.
It's true that the U.S. and the U.S.S.R. were allied when they both perceived a greater evil than each other to fight -- the ruthless Nazis of then fascist Germany. Sometimes a severe crisis makes for strange bedfellows.
But if the U.S. and U.S.S.R. were allies - they were never friends, and both sides held their noses as they fought the Nazis together. Indeed, it could be said that Stalin made Hitler look like a amateur -- Hitler killed 6 million Jews -- but Stalin killed perhaps more than 20 million of the people he didn't like -- yet, he was our ally!
Why the Cold War -- it gets down to fundamental differences in philosophy over how a nation and society should be run. America was a free market democracy based on Capitalism and the Soviets were Socialists, not a free country, and felt that people need to be ruled with an iron hand in order to maintain the power structure of their nation.
It should be said that the U.S.S.R. was not so much a Communist country, but a country that claimed to be Communist while never really putting the system into play. The Soviet Union was a military oligarchy that never really went too far beyond what Russia had been historically for centuries -- an absolute dictatorship with the Czar at the top, and everyone else below.
Each country had a fundamentally different view of reality, and what it meant to be an organized unit called a nation on the world stage. Both thought it's system was better, and both felt threatened by the other. Thus the Cold War.
Haha, no my friend and I are arguing, and I am using my superior friends to gain an upper hand... anyway, I appreciate your help

One thing I have noticed in my research is that we did a kind of "trade", that is we surrounded Stalin with friendly governments (I suppose that means Communists) in order for his participation in the war in the Pacific. However, he took control of Poland, an act in violation of the Yalta agreement and never helped us with Japan. Hell, that would piss me off if I was the US.