Abstract: This book sheds light on Clausewitz's purpose in writing On War, and the methodology he employed. While many scholars agree that Clausewitz's work is frequently misunderstood, almost none have explored his methodology to see whether it might enhance our understanding of his concepts. This book lays out Clausewitz's purpose and methodology in a brisk and straightforward style. It then uses that as a basis for understanding his contributions to the ever growing body of knowledge of war. The specific contributions this study addresses are Clausewitz's theories concerning the nature of war, the relationship between war and politics, and several of the major principles of strategy he examined. These theories and principles lie at the heart of the current debates over the nature of contemporary conflict. They also underpin much of the instruction that prepares military and civilian leaders for their roles in the development and execution of military strategy. This book is organized into three parts. The first provides students with background information concerning Clausewitz's purpose and method. The second lays out his theories regarding the nature of war, his ideas concerning the relationship between war and policy, and the complementary balance between friction and military genius. The final part examines his concept of strategy, and several of his strategic principles, particularly the centre of gravity, and reveals how they relate to contemporary war. Together, these themes represent the core of what professional military curricula usually cover of Clausewitz.

Keywords: knowledge of war, centre of gravity, military genius, friction and war, nature of war, military theory