Several years ago, during a visit to the U.S. Army War College, I was invited to have lunch with some of its instructors. The school teaches Army officers about strategy and its course offerings (“Civil-Military Relations,” “Peace and Stability Operations,” “Irregular Warfare”) reflect that mandate. So, naturally, the lunch discussion focused on strategy, and how to teach it. While I don’t now recall the exact details of that conversation, a statement by one of the war college’s professors has stayed with me. It brought immediate laughter — and unanimous assent. “Just remember,” he said, “that no matter what the question, the answer is always Clausewitz.”