Human beings only have two ways to deal with one another: reason and force. If you want me to do something for you, you have a choice of either convincing me via argument, or force me to do. When I carry a gun, you cannot deal with me by force. You have to use reason and try to persuade me, because I have a way to negate your threat or employment of force. So yes, I agree gun is civilization.
Great explanation.
Guns are tools meant to help us. The main argument of those who are against them is that they give too much power. One moment you're walking down the street and another you're dead after being shot in the head by some maniac. But this can happen anyway. Gons already exist and this maniac will be there whether you like it or not. Carrying a gun will give you the edge if you meet this maniac face to face. If you won't have it what will you do against him? Start running?