Though wars are terrible and destructive, they also seem unavoidable. In this original and deeply considered book War: An Enquiry, Grayling examines and challenges the concept of war. He proposes that a deeper, more accurate understanding of war may enable us to reduce its frequency and mitigate its horrors. Grayling explores the long, tragic history of war and probes much-debated theories concerning the causes. Grayling envisions a war theory in new moral terms, considering the lessons of World War II and the Holocaust, and laying down ethical principles for going to war and for conduct during war.