Answer:
The United States could have not prevented WW2
Explanation:
The post-WW1 bitterness of Germany, the spread of Fascism and Communism, and the Great Depression, were factors that were just to great for the U.S. to control even if the United States was aggressive with foreign policy instead of neutral. The U.S. was not ready for war if they tried stopping Germany in the 30's from taking Austria and the Sudetenland. The threat from Japan and Great Depression put too much stress on the U.S. and if the U.S. was not even ready to fight a two-front war, they had no shot preventing conflict thousands of miles away in Europe.
