I think the core problem is much closer to recognizing where force is of value, where it is useful, and to distinguish that from situations in which war is not useful or is indeed counterproductive.

The most important six inches on the battlefield is between your ears.

If in order to kill the enemy you have to kill an innocent, don't take the shot. Don't create more enemies than you take out by some immoral act.

There are some people who think you have to hate them in order to shoot them. I don't think you do. It's just business.

The United States has been essentially engaged in an ongoing war that most people date from 2001. That war has taken us to Afghanistan, to Iraq, in a lesser way to other countries - Libya, Somalia, Yemen.

Treachery has existed as long as there's been warfare, and there's always been a few people that you couldn't trust.

I don't see lethality as the problem. I mean, the lethality of US forces is quite remarkable.