If the tradition which claims that war may be justified does not also admit that it could be unjustified, the affirmation is not morally serious. A Christian who prepares the case for a justified war without being equally prepared for hte negative case has not soberly weighted the prima facie presumption that any violence is wrong until the case for an exception has been made.
John Howard Yoder, When War is Unjust: Being Honest in Just-War Thinking
christianity, politics, theology, warfare