Few people have ever really read Clausewitz masterpiece "On War," but a lot of people like to speak of him in a dismissive way. He is often referred to as an advocate of the use of brute force involving mass conscripted armies, victory by attrition and many other concepts to which he was completely opposed.
In fact he was a humanist philosopher who had twenty years experience of war against Napoleon (the god of War).
He has left us this little chapter on what he called "Information in War" (intelligence). The events of recent years and some of the remarks directed to this space indicate to me that we would all benefit by a close reading of his words here.