The United States and the Soviet Union became rivals after World War II because...

Communists and Western capitalists had distrust between them. Opposing ideologies began to see the cracks in their alliance, the only world super powers had different beliefs and ideals. Friendships and rivalries begin with trusts and distrust, with fear that the other side wanted to get rid of them, both sides began to rapidly expand their influence across the world.

Every statement this is because of the same law