What was the greatest impact of the Cold War?

1.It kept tourists from visiting the Soviet Union.
2.It caused a large number of people to fear nuclear war.
3.It kept the United States and the Soviet Union from becoming friends.
4.It cost a great deal of money to defend the United States from imminent attack.

The greatest impact of the Cold War was number 2: It caused a large number of people to fear nuclear war. The threat of nuclear war between the United States and the Soviet Union loomed large throughout the Cold War, instilling fear and anxiety in many people around the world. The possibility of a nuclear conflict and the devastating consequences it would bring influenced government policies, shaped international relations, and impacted popular culture during this time period.