Quag: Can we please stop beating up on UtF? One can't win an argument, because both people will only leave it feeling more strongly about their opinion than before. Talking and listening is the only way to find the best solution, whether it's what one person thinks or a collaboration of ideas.
UtF: You are right that violence is not needed for a society to work. If a society didn't need violence, it would be much better than what we have today. However, though not you nor I nor the vast majority of people in the world would use violence without reason, it is the minority that make violence necessary. If an institution didn't enforce its laws, its laws would be overrun. Without laws, the society would collapse and those few violent people--those with morals that oppose ours--would rule.
Again, violence can only be avoided when everyone is unified in their morals and wants to do what's right. Different morals will eventually lead to dispute and then to violence. I think it would be helpful to note that our government's violence is defensive. You said yourself that you would defend yourself if you were threatened. While it may not be directly, governments protect us from the chaos and violence that would eventually emerge without it. And violence is needed to defend oneself against violence. And again, while all governments inevitably have corruption and thus violently take from their citizens, it is our duty to make it the least corrupt as possible and thus remove such violence.