There is a huge amount of secondary material about On War. Many books, often by very competent scholars, and an enormous number of articles, all offer us shortcuts into Clausewitz’s thought.
I decided to read none of it. I did not care very much, for now, about Clausewitz scholarship, and I did not care if I replowed already well-plowed ground. To the extent I got any “new” insight from On War, it was inevitably something that is “old” in terms of the voluminous critical writing. Someone else certainly thought of it first.
But, for me, the point was not to engage in some kind of academic exercise. I am not an academic, I do not have academic colleagues, I do not publish scholarship about military matters, I do not have classes either as a teacher or student. I have no need to be “up to date” or “cutting edge” about Clausewitz.
Instead, I am simply an amateur who is a lifelong student of military history and military affairs, and a citizen who prefers to have some understanding of the world and the threats our country faces, and how we might deal with those threats.