Why does everyone seem to think that man has a great desire for causing mayhem? Sure there will be troubles whether religion is present, or not, but the violence that plagues our societies would not stay the same or increase if religion was absent from a society. This is based on the fact that actually very little troubles are caused by greed and a desire for power in comparison to the troubles that are caused by religion. If religions are peaceful, and it actually does preach the 'Thou shalt not kill', then why would the Pope authorise Crusades? And because of the variety of religions, and the people that want to impose their beliefs upon others, you can say that all religions are violent. If one were to do some research, they will plainly see the havic that religions cause.