Streamer,

I once thought isolationism would be a preferred strategy for the US. But I wasn't yet up to 5th grade level knowledge (to use FP's term) of world affairs. US interests are so inextricably tied to points all around the planet that isolationism is counter to our needs and interests. I think isolationism would lead to a world where allied forces opposed to us would become large and powerful enough to take us down. That's an outcome to be avoided IMO.