Very Short Introductions: Brilliant, Sharp, InspiringIs religion a force for war, or a force for peace? Some of the most terrible wars in history have been caused and motivated by religion. Much of the violence that fills our screens today springs from the same source. Yet some of the bravest pacifists have also been deeply religious people, and many of the laws and institutions that work to soften or prevent war have deep religious roots. This Very Short Introduction provides an overview of the history of religion and war, and a framework for analysing it. Ranging from the warrior gods of Ancient Greece and Rome, and the ethical drama of the Mahabharata, through the Islamic wars of conquest and the Crusades, to present day conflicts in Sri Lanka and the Balkans, it considers the entanglement of war and religion. Yet from Just War theory and the restraints on war-making imposed by Islamic jurisprudence, through the Pax Christi of the middle ages, to the non-violence of Gandhi and Bacha