Fascinating stuff. Thanks guys.
My training is in anthropology, biopsychology type stuff (stress response, addiction that sort of thing). But I've always been fascinated by warfare and conspecific violence in primates more generally.
It is remarkable that in the same war we have the full panoply of human capacity, but then I suppose that is always the case in war, or very often anyway.
I believe those vets who recounted the nightmares. One of the last "extra-curricular" books I read before I retired from academia was about the permanent "psychic trauma" (meaning trauma of the psyche, not telepathy!
) suffered by many soldiers as a result of killing.
Submarine warfare: just about as far outside the human "environment of evolutionary adaptedness" as possible without going into outer space! Amazing era in human history.