The most likely way to die in a U.S. war, by far, is to live in the country that the United States is attacking. But the most likely way in which a U.S. participant in a war will die is by suicide.
There are a couple of widely observed top causes of hundreds of thousands of U.S. troops returning from recent wars deeply disturbed in their minds. One is having been near an explosion. Another, which has been around longer than explosions have, is having killed, having nearly died, having seen blood and gore and suffering, having imposed death and suffering on innocents, having seen comrades die in agony, exacerbated in many cases by having lost faith in the sales pitch that launched the war — in other words, the horror of war making.
The first of those two causes might be called traumatic brain injury, the other mental anguish or moral injury. But, in fact, both are physical events in a brain. And, in fact, both impact thoughts and emotions. That scientists have a hard time observing moral injury in brains is a shortcoming of scientists that ought not to start us imagining that mental activity isn’t physical or that physical brain activity isn’t mental (and therefore that one is serious, while the other is sort of silly).
Here’s a New York Times headline from Friday: “What if PTSD Is More Physical Than Psychological?” The article that follows the headline seems to mean by this question two things: