Isolationism -- "America First" and "Fortress America" -- is a continuing theme of American political history. The US scores NEXT TO LAST in a National Geographic survey of world geography knowledge. See these disturbing articles:
Geography Is Greek to Young Americans
Americans Shaky on Geography
Americans Fail Geography. Are Other Nationalities Better?
I never studied world history as a required course in school. What I've learned has, until recently, come from what I have picked up on my own. At a ripe old age, I'm filling in the gaps in my world history knowledge as I teach and tutor my son in seventh grade world history. Alas, his peers back in the states are not taking world history, but North Carolina history, something he'll have to learn later, I guess, when we return to North Carolina.