This new edition of Colin Gray's textbook explores the theory and practice of war and peace in modern historical context. War, Peace and International Relationsserves as an excellent introduction to the international history of the past two hundred years, showing how those two centuries were shaped and reshaped extensively by war. This book takes a broad view of what was relevant to the causes, courses, and consequences of wars. The second edition has been thoroughly revised and updated, with new material on colonial warfare, the American Revolution and technology and warfare. This textbook is an invaluable resource for upper-level students of strategic studies, security studies, war studies, international relations and international history.