A quick summary.
So we talked so far about:
 - non-participating and
 - mis-firing soldiers.
Touched key concepts:
 - the four possible options a soldier faces on the battlefield
 - enabling factors of killing
 - denying humanity
 - conditioning via training
 - predisposition toward "aggressive psychopathic personalities"

Next we'll move on the stress the soldiers have to endure and it's impact.