The United States did not want to get involved in WW2 because isolationist believe that since no country had yet instigated the US, there was no good reason to get involved in the war. But the US was forced to fight after the bombing of Pearl Harbor (which I kinda think is weird since Hawaii wasn't annexed until 1960 into the US)
Also:
I think it's funny that that looks like a page from Dr Seuss lolololololololololololol
The disputes that the colonists had with these three acts were angry these colonist were being taxed unfairly which in the futur lead to revolutionary war.
The Monroe Doctrine was successful in keeping the United states out of European affairs because after it was issued there was a decrease in foreign conflict for nearly 100 years until WWI.