Greg Scoblete flags a study:

According to a new report from the Human Security Report Project, the number of deaths from armed conflicts around the world continues to fall, even while intercommunal wars have jumped and other conflicts have become increasingly difficult to bring to an end. What wars are fought are less lethal, too. "The average annual battle-death toll per conflict in the 1950s killed almost 10,000 people; in the new millennium the figure is less than 1,000," the report states.