The origins of this problem are the conflicts among people. They fights among themselves to get more territories or think they are better than others.
The consequences are the death of innocent people, who even don’t want the war to go on, like children, elderly people, etc.
I think this problem can be solved if everybody collaborates and just try to use arms, not for killing people, because if you kill somebody, you harms the family.
But one day or another maybe somebody will kill someone of your family and the one who will suffer it is you.