False
As the population grew and the years went on many Americans began moving to large cities instead of living on farms.
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The correct answer is <span>3. fear of a nuclear war between the two nations
There was a fear of mutually assured destruction, as it was called in the early days of the cold war, in 50s and the 60s. It was believed that if the war began that there would be no way for any side to win so they feared going to war out of fear of also being destroyed. They started building a bridge towards peace much later.</span>