Since there’s no world war or major conflict going on at the moment – in fact, in 2013 there were no declared inter-state wars ongoing – the number of war deaths is relatively limited nowadays. Only about 10% of all violent deaths occur as a result of armed conflicts. Whereas more than a million people lose their lives to violence each year, about half of those are suicides and a third are homicides. From 1950 to 2007, there was an average of 148,000 global battlefield deaths per year; from 2008 to 2012, the average was 28,000.
Of course, it wasn’t always like that. Worldwide, deaths caused directly by war-related violence in the 21st century have averaged about 55,000 per year, just over half of what they were in the 1990s, a third of what they were during the Cold War, and a hundredth of what they were in World War II. That is without correction for population growth.
Since the beginning of recorded history, around 3600 BC, over 14.500 major wars have killed about four billion people, a number that not so long ago equaled the whole of humanity. The wars that took place in the 20th century killed around 200 million people; in the Second World War, 66 million died, compared to 15 million in the First. However, if you count the 50 to 100 million deaths from the 1918 flu pandemic – facilitated by close troop quarters and massive troop movements – WWI is the deadliest conflict in world history.
Since the Second World War, there have been on average about 30 armed conflicts ongoing every year. 90% of casualties in these conflicts have been civilians, compared to 50% in the Second World War and 10% in the First. 128 armed conflicts since 1989 have resulted in at least 250,000 deaths each year.