Atheists and secular humanists consistently make the claim that religion is the #1 cause of violence and war throughout the history of mankind. One of atheism's key cheerleaders, Sam Harris, says in his book The End of Faith that faith and religion are “the most prolific source of violence in our history.”1
An interesting source of truth on the matter is Philip and Axelrod’s three-volume Encyclopedia of Wars, which chronicles some 1,763 wars that have been waged over the course of human history. Of those wars, the authors categorize 123 as being religious in nature which is an astonishingly low 6.98% of all wars. However, when one subtracts out those waged in the name of Islam (66), the percentage is cut by more than half to 3.23%.
The truth is, non-religious motivations and naturalistic philosophies bear the blame for nearly all of humankind’s wars. Lives lost during religious conflict pales in comparison to those experienced during the regimes who wanted nothing to do with the idea of God – something showcased in R. J. Rummel’s work Lethal Politics and Death by Government:
Non-Religious Dictator Lives Lost
Rummel says: “Almost 170 million men, women and children have been shot, beaten, tortured, knifed, burned, starved, frozen, crushed or worked to death; buried alive, drowned, hung, bombed or killed in any other of a myriad of ways governments have inflicted death on unarmed, helpless citizens and foreigners. The dead could conceivably be nearly 360 million people. It is though our species has been devastated by a modern Black Plague. And indeed it has, but a plague of Power, not germs.”
The historical evidence is quite clear: Religion is not the #1 cause of war. via Tea at Trianon