As a former Marine infantryman, and a former Marine PR idiot, I think his numbers are off but a lot of the concepts are right, with a caveat. It's not sociopathy of the organic sort. It's the kind of detachment from prolonged exposure to extreme, unmitigated stress. So don't take this article as justification to feel like there's something mentally wrong with people who join a combat arms unit.
Former 0311. After I EASd I realized that a _lot_ of perfectly normal behavior in the service is downright _weird_ in the civilian world. It was perfectly normal to make my rack (bed), tuck those hospital corners in, get the folds just so ... then sleep on top of the made bed, wrapped in a poncho liner or a comforter from the PX. Because you save time and hassle in the morning. Toss the blanket in the wall-locker, ti…
This is part of the brilliance of the military: they mostly use young people who are still maturing and often don't know any better and brainwash them in to doing their bidding. Older, more experienced people are not so easily used.
I have a feeling if humans were physically feeble and infirm for their first 25 or 30 years and became fit and healthy afterwards, we'd have a lot less war.