Look now -- in all of history men have been taught that killing of men is an evil thing not to be countenanced. Any man who kills must be destroyed because this is a great sin, maybe the worst we know. And then we take a soldier and put murder in his hands and we say to him, "use it well, use it wisely." We put no checks on him. Go out and kill as many of a certain kind or classification of your brothers as you can. And we will reward you for it because it is a violation of your early training.
John Steinbeck, East of Eden
murder, soldiers