Answer:
they come from different backgrounds
Both nations were trying to promote their own ideologies, the United States Capitalism, and the Soviet Union Communism. The majority of the clashing came from that base disagreement.
Answer: Smith made a number of important criticisms of mercantilist doctrine. First, he demonstrated that trade, when freely initiated, benefits both parties.
Explanation: because Second, he argued that specialization in production allows for economies of scale, which improves efficiency and growth.
Protestantism and Catholicism
Protestantism was the religion developed by Martin Luther (hence the name "Protestant Revolution").
Catholicism was the stricter version of Christianity that the broke away from.