Final answer:
One of the primary changes after World War II was the creation of newly formed sovereign countries. The United States emerged as an economic superpower, and the conflict between communism and capitalism led to the Cold War.
Step-by-step explanation:
One of the primary changes after World War II was the creation of newly formed sovereign countries around the world. These countries struggled with concepts of democracy versus authoritarianism, and many had to overcome poverty and lower living standards. In addition, the United States emerged as an economic superpower, while the Soviet Union also became a powerful country. The conflict between communism and capitalism spawned the Cold War, bringing persistent economic and political tension between the Soviet Union, Europe, and the United States.