The reason this book is a timeless classic is because it analyzes all aspects of war from the standpoint of human nature, and makes a solid case that any endeavor that fails to take into account human nature is doomed to failure. Because the subject is warfare, including its causes, and the analysis is solid, one is left with not only the first order result (how to handle a war situation effectively) but also a life changing understanding of the humbling constraints of human existence and the pragmatics of applied psychology. Anyone who is bored by this book (and this particular one is excellent) is not yet ready to learn basic lessons about human existence. Anyone who is capable of humility will be changed by this book. It should be read by everyone, several times throughout life.