This thesis addresses the problems inherent in teaching on war in schools. The focus is on the moral acceptability of killing in war, and the issues this raises for educators. It argues that war can only properly be presented in the curriculum as a controversial issue. In the first chapter it is maintained that war is undeniably a moral matter. Beliefs about aggression are explored to show that international military conflict is not an unavoidable feature of human existence and that war is a prima facie evil. Grounds for the absolute prohibition on taking life are then examined in Chapter 2, to demonstrate that pacifism is not an uncontestable stance. Just war thinking is investigated in Chapter 3. The immunity of civilians demanded by just...