Also do you think those people would have followed HItler had they not thought they could be part of his world dominating scheme. Would they have followed him had he not had the weapons that they thought were needed to conquer? Had he not had tanks? Had he not HAD GUNS? Now take that same scene, and put it in a world where all guns had been taken and destroyed and you have a recipe for disaster. When countries go to war, many times they make major advancements in their fighting and weaponry. Those advancments are WELL DOCUMENTED for later use. Lets say all guns are gone. They have technology and plans to make more.