To understand that, you have to, for a moment, think about combat not morally -- that's an important job to do — but for a moment, don't think about it morally, think about it neurologically.
Lai to saprastu, jums uz brīdi jāapdomā kauja  nevis no morālā skatpunkta, tas, protams, ir svarīgi, bet uz mirkli nedomājiet par morāli, padomājiet par to  no neiroloģiskā skatpunkta.