?? 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.