As an antidote to easy pessimism here is a UN report, or UNish, about inter and intra state violence, Human Security Report 2009/2010. According to the numbers things are getting better. There is still war but the numbers and severity has decreased. Of course people are still dying. But then things can always be bad as this passage from The General by SM Sterling shows.
Of course, the last battle—his first—had shown him you could get killed very dead indeed in the middle of the most smashing victory. Gharsia's lungs and spine blasted out through his back illustrated quite vividly what could happen to an experienced veteran on the winning end of a one-sided slaughter.