The Psychological Trauma of Killing
https://www.psychologytoday.com/blo...h-becomes-us-the-psychological-trauma-killing
And what about the suffering that comes from being the one who does the killing? According to Lt. Col. Dave Grossman in his book, On Killing, it turns out that people, including soldiers are not “naturally born” to pull the trigger.
In Grossman’s view, it has long been a myth that one of the greatest threats to mental health while at war is the fear of dying. At least as distressing is the act of taking the life of a fellow human being, regardless of nationality or circumstance. This can be seen when soldiers put themselves in danger to avoid having to kill someone else, an act that, in Grossman’s experience, occurs more frequently than we think.
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Killing is often misrepresented in film as far easier than it is. In reality, the “duty” is mentally taxing, leaving most soldiers physically ill in the moment and often haunted by nightmares for a lifetime. Being responsible for ending the life of another human is a significant source of trauma; trauma that is compounded by factors such as proximity to the victim and the type of weapon used.