On a smaller level, societies where people own guns are usually more peaceful ones.
In what world are you living where societies where people own guns are peaceful ? If people own guns, people will be killed by guns. If people have no guns, they can't kill their family by mistake when thinking being in presence of a criminal or when being drunk. If people have no guns, children can't take them at school and kill other students. I live in a country where there is a few guns, and we have many less problems. No Columbine here. No Corean killing others after playing Sonic... And, when a problem occurs, no need to say that's the GTA fault cause we don't have to protect guns sellers' business.
Living on Earth may be expensive, but it includes an annual free trip around the Sun.