There are some  -  called 'death fatigue'  -  people who just grow so tired of death, so they don't want to keep perpetuating death and creating more victims and more anger and more pain. They want to heal from that, and I think that's exactly what God wants to do. And, interestingly enough, that's part of what God's original law was doing with the 'eye for an eye' thing. It was actually to limit the patterns of retaliation and then to begin to heal from that.