by David Cantor
In the aftermath of mass murders, as in Las Vegas, we constantly hear that killing others arises from human nature. Filmmaker Ken Burns stated in his “Fresh Air” interview about his recent release on the Vietnam War, “War is human nature in spades.”
Yet, during my 28 years studying human beings’ killing of others, I discovered this from the leading expert on training human beings to kill in war, psychologist Lt. Col. Dave Grossman, in “On Killing: The Psychological Cost of Learning to Kill in War and Society,” “[D]espite an unbroken tradition of violence and war, man is not by nature a killer.” Grossman invokes findings that even with military training and indoctrination, many soldiers deliberately fire over the enemy’s head.
As consistently indicated in a great many sources on morality in human…
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