National defense may be at risk due to free trade
It was their neutrality. They were still in the process of building a country. Setting up laws and meeting the needs of the people were their primary concerns. As much as possible, they avoided conflict as much as they could.
The industrial revolution was a shift from the old methods of manufacturing to the new methods, this took place from 1760 to sometime between 1820 and 1840. After the industrial revolution, areas which were rich in its resources such as rubber and petroleum began to become the colonies of the European powers
The US tried to stop the spread of communism by the Marshall Plan (giving economic aid to devasted countries), by the Berlin Airlift, by the creation of NATO and by helping form the United Nations.