The main reason why revolution swept so many African nations following their independence from European rule was because there was a giant power vacuum that needed to be filled--usually by a dictator.
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People who didn't own slaves, as people who aren't just old crusty fat white men.
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A main difference is the context of the war. The American Revolution was caused by a majority of the America population becoming unhappy because of how the British were ruling them. The French Revolution started between the French lower class and the French government.
Hope this helps ;-)