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The U.S did not join the League of Nations following WWI. Even the the President of the United States at that time, Woodrow Wilson, was enthusiastic about the organization, they didn't officially join it. The reason why they didn't join it was because of isolationists in congress, in other words, people that didn't agree with what other people are interested in. Because of the war and all of the fatal deaths of Americans, people didn't want the U.S to be affiliated with Europe in any way.
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They could have decreased protectionism. Protectionism means that they limited free trade between nations and restricted trade of foreign goods. Protectionism is widely accepted as maybe the biggest reason for the development of the Great Depression and thus if the US had decreased it, it most likely would not have happened at all.
Answer:
Well first of all the answer to your question is no. The Europeans treated African slaves horribly. They made them work all day. Slave trading between Africa and Europe began with the Portuguese, who were the first European nation to make continuous contact with Africa. African slaves were mainly taken to Europe to be used on a land that needed slaves. If a slave got tired, and slowed down or stopped, they would get a punishment.
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