An important book on the roots of war, remarkable in its theoretical rigor and historical sweep. Van Evera demolishes the view that war is an inevitable outgrowth of an anarchic world that encourages belligerence.(Foreign Affairs) This is a very logical and historically well-informed book, which argues that the realist explanations of war may be missing one of the most important aspects of power: whether the offense is thought to be favored instead of the defense.(Political Science Quarterly) Van Evera's book is a masterful work of positivist social science.... He offers convincing evidence to show that offense-defense theory is a major explanation for the onset of modern wars.(Choice) Van Evera's volume is sure to become a core work in the field of war studies. It deserves to be read by anyone with a serious interest in the causes of war.(Journal of Strategic Studies)