It has nothing to do with pacifism but rather the role the Framers intended for this union of states. WWII was necessary. But if only to fix Wilson's mistakes. Unfortunately once you start down that road every 'fix' creates yet another mistake.
I agree. When we fix one world problem, another one results. We will never have peace the way things are now.
The question becomes...how much do you undertake to do to save people who are in trouble right now? How much do you undertake to do to deter folks who you realize want to harm you?