I learned history from being alive and seeing what was done. Roosevelt didn’t join the war against the most brutal dictator in history until after Japan joined in the war on the side of Germany. Pearl Harbor had not happened we never would have joined in the war.
Our constitution would have prevented us from going to war without the approval of Congress. If it hadn’t done that, too bad for Europe.
We were going to be involved in fighting the Axis powers whether Japan attacked us or not. If Roosevelt wanted to stay neutral he never would have signed the Lend-Lease Act to help Britain in 1940.