Or let terrorists continue to blow up our buildings and slaughter Americans here and the world over. I guess that isn't much of an extraordinary emergency either.
If we minded our own business during WWI, Hitler and WWII wouldn't have happened.
How about the Cold War? Maybe we should have let communism take over the whole rest of the world? Would that be the good conduct towards nations to which we are enjoined by Religion and Morality which Washington spoke of?
Communism has probably done more damage to commuist countries than commuist countries ever would have done to us.
It's also possible that the Russian Revolution might not have survived had we not interfered in WWI.
We entered just about the time all antagonists were willing to talk peace, and we thereby prolonged the war--and so continued the discontent and chaos in Russia and Europe.
Certainly, had the European nations not been entangled in their own alliances to begin with, WWI would not have happened and communism would not have taken over Russia.