It is commonly believed that people in certain circumstances possess a right to self-defense. This exists not only on an individual but also on a collective level, historically known as Just War Theory. During the 20th century this theory has undergone a revival in academic circles, mainly due to the invention of nuclear weaponry, the cold war and America's military involvement in Vietnam. Yet, many of the assumptions of the Just War Theory have been challenged and undergone a revision, and a separate school of thought has emerged: the "revisionist" just war theorists. A core feature of their...