Without religion there would still be war; however, without religion there would be less war. Religion is what motivates the jihadists, and religious differences provides at least some of the support for the wars in Iraq and Afghanistan. Throughout history many wars have been fought due religious differences. The Crusades were motivated by religion and the less well known Thirty Years’ War was also motivated by religion. Those are just two (well the Crusades were actually several different wars, but you get my point) of the many wars fought for religious reasons. Wars fought for religious reasons are among the most brutal and