Flashback:Post-9/11 wars have contributed to some 4.5 million deaths, report suggests

The full death toll of violence in the U.S.-led invasions of Afghanistan and Iraq, let alone of the broader global war on terrorism, remains difficult to determine. But it has long been surpassed by an even larger and more opaque figure: the indirect count of people who have died as a result of post-9/11 conflicts’ far-reaching ripple effects, such as ensuing waves of violence, hunger, the devastation of public services and the spread of disease.

Brown University researchers, in a report released Monday, draw on U.N. data and expert analyses to attempt to calculate the minimum number of excess deaths attributable to the war on terrorism, across conflicts in Afghanistan, Pakistan, Iraq, Syria, Libya, Somalia and Yemen — impacts “so vast and complex that” ultimately, “they are unquantifiable,” the researchers acknowledge.

The accounting, so far as it can be measured, puts the toll at 4.5 million to 4.6 million — a figure that continues to mount as the effects of conflict reverberate. Of those fatalities, the report estimates, some 3.6 million to 3.7 million were “‘indirect deaths” caused by the deterioration of economic, environmental, psychological and health conditions.