Why can't people get it through their heads that killing will only make matters worse?

As we're looking around the world, all we seeing is people killing people. No one really know the real reason, except for what they tell us on tv, which a lot of us are quick to believe. Now, in the year of 2011, i think we have about 4 wars going on, all in which innocent people are dying. In result to that, everything is going us, the world seem to be going through a global crisis, mostly because we don't know how to put our heads together. The direction we're heading will never lead to anything good. We're just digging a dipper whole to put ourselves in. whats your view on that?