Why were the US and the Soviets on opposite sides of the Cold War?

the US and the soviets were on opposite sides of the cold war due to many reasons. one reason is that they had different opinions on how governments should be run. the us wanted democracy and the soviets wanted communism. they both tried stopping the other political system from spreading. Germany was also a main reason. the united states wanted to put back west and east Germany. the us wanted to stabilize Germany so that Germany could rebuild its economy and trade with the us. the soviets wanted Germany to stay divided. the soviets wanted this because they were having a lot of problems that were caused by Germany. the soviets felt that if Germany was reunified the could become a threat to them.