A Single Factor as the One most Responsible for the Origins of the Cold War

Pick a single factor as the one most responsible for the origins of the cold war. You can choose a person, an event, even an ideology or belief system, but provide a thorough and convincing explanation as to why you consider this factor to be the most significant. You may also, if you choose, argue that the cold war was inevitable, but again you must support this claim with the use of specific evidence.
As World War II came to a close, the United States and the Soviet Union emerged as the world's two most powerful nations in terms of military and political power and influence.…