Vigilance for sure, miller. But the Second or constitutions or anything else won't give us the societies we want by themselves---that is, without the blessing and spirited support of the people. Even then, because we are human, we make colossal mistakes in intelligence gathering, military planning and safety preparations for natural disasters. Nothing is safe and certain. The only gun law moving in the right direction anywhere that I remember is Canada's quiet and uncontentious removal of long gun registration, which followed the Montreal Massacre.