Explain the roots of the cold war?

The Origins of the Cold War are widely regarded to lie most directly in the relations between the Soviet Union and the allies (the United States, Great Britain and France) in the years 1945–1947. Those events led to the Cold War that endured for just under half a century. 

The roots of the Cold War was that the U.S. and the Soviet Union were in bad terms since the beginning because the Soviet Union followed communism and the U.S. followed their containment policy. Also, World War II had ended and the U.S. demonstrated that they have the power to drop atomic bombs. Following World War II, the U.S. came out as an economic powerhouse, while others not so much. Then the Soviet Union launched Sputnik into space. This started the Space Race. Then president Kennedy said they could take a man to the moon. And they sure did!