Can you think of a more effective way to avoid inter-state wars than to encourage dialogue? Because our leaders who lived thorugh and fought ww2 could not. Given that we haven't had a major war since then, they continue to have more experience than us in these matters.
Is the United Nations the actual reason why we haven't had a "major war" since WW2, or would that be US power looming over the international system, keeping trade routes open and actually doing the work of facilitating economic productivity? You may disagree with my leading questions, but I disagree with your absolutist declaration. Both of us have evidence, which means that for the time being, all of our evidence is non-conclusive.
The moon is made of green cheese. -- John Heywood