Our March Towards Peace?

Sorry for this emotional post but this idea has been on my mind for a while.  If it's too upsetting just skip it.
By now I imagined the world be at peace, using the fortune spent on warfare to improve everyone's life.  But it's worse than ever. Will there be a third world war?

I remember what my uncle Ben told us. He believed that war was a way that nature used to stop overpopulation. Sounds strange doesn't it?

But is war an inevitable uncontrollable force of evil?

(Try full screen and more volume.)

Is it hopeless?