> Between 1861 and 1933, they had one of the highest average tariff rates on manufactured imports in the world. After 1942, the U.S. began to promote worldwide

> Between 1861 and 1933, they had one of the highest average tariff rates on manufactured imports in the world. After 1942, the U.S. began to promote worldwide free trade. The US did this because of the free trade treaties between west European states after WW2. This eventually led to the EU. The US, not wanting to be isolated, pushed for their own treaties.