While the next part doesn't really fit into my order I'm intend to present these thoughts in the book this comes next immediately:
The question is why. Why did these men fail to fire? As I examined this question and studied the process of killing in combat from the standpoints of a historian, a psychologist, and a soldier, I began to realize that there was one major factor that was missing from the common understanding of killing in combat, a factor that answers this question and more. That missing factor is the simple and demonstrable fact that there is within most men an intense resistance to killing their fellow man. A resistance so strong that, in many circumstances, soldiers on the battlefield will die before they can overcome it.
And what I've already scratched a bit:
To some, this makes "obvious" sense. "Of course it is hard to kill someone," they would say. "I could never bring myself to do it." But they would be wrong. With the proper conditioning and the proper circumstances, it appears that almost anyone can and will kill. Others might respond, "Any man will kill in combat when he is faced with someone who is trying to kill him." And they would be even more wrong, for in this section we shall observe that throughout history the majority of men on the battlefield would not attempt to kill the enemy, even to save their own lives or the lives of their friends.

That's it for today. Tomorrow I'm not sure I'll have the time to continue but on the weekend I sure will.