Abstract: One of the most influential versions of modern war ethics is from Michael Walzer. In his theoretical assumptions, he mainly criticizes realism and suggests that moral evaluation completely apply to war. As for the justice issue of making wars, he amends legalism paradigm and points out that besides fighting against aggression, righteous wars also means striking first to gain the initiative and military intervention. As for the justice issue of war time, he advocates combining moral absolutism in normal times and utilitarianism under the most critical situations. For Walzer, the basis of war ethic thoughts is communitarianism.

Key words: war, justice, political community, right