If America had intervened earlier, it is likely that fewer innocents would have
died in Germany. We did not know, but perhaps we should have. America
then had a strong strain of isolationism. We wanted no part of the wider
world’s troubles. It was not until the Japanese struck at our own soil that
we moved to join the war. Even now, America consistently acts in its
own interests. Perhaps though, that is the nature of all governments.
Most Americans did not support entering the war before the attack on Pearl Harbor. It was only after this attack that there was widespread support for the war. Even if FDR had wanted to enter the war sooner, he could not declare war without support form congress. Congress would not act without support of the people. America could not have entered the war sooner.