David Grossman, a former U.S. military psychologist who helped develop programs to train new recruits to become more effective killers, said that the key to military training lies in breaking down the natural human aversion to killing in a process he calls "disengagement." Once this aversion has been removed, it never comes back, and can make it easier for former soldiers to become murderers.
"The ability to watch a human being's head explode and to do it again and again -- that takes a kind of desensitization to human suffering that has to be learned," Mr. Grossman said yesterday.
In earlier wars, many soldiers were psychologically unable to shoot anyone. In order to increase the "trigger-pull ratio," the United States changed the basic training offered to all recruits and draftees so they would be aggressively desensitized to killing.
Some observers believe this may be why mass murders have become far more common in the past 50 years.
In the 1970s, some observers believed that the humiliation and social opprobrium caused by the Vietnam War, led many former soldiers to become mentally unstable, and potentially to become serial killers.
"The ability to watch a human being's head explode and to do it again and again -- that takes a kind of desensitization to human suffering that has to be learned," Mr. Grossman said yesterday.
In earlier wars, many soldiers were psychologically unable to shoot anyone. In order to increase the "trigger-pull ratio," the United States changed the basic training offered to all recruits and draftees so they would be aggressively desensitized to killing.
Some observers believe this may be why mass murders have become far more common in the past 50 years.
In the 1970s, some observers believed that the humiliation and social opprobrium caused by the Vietnam War, led many former soldiers to become mentally unstable, and potentially to become serial killers.