It seems that the larger the group of people that attempt to live together, the more morals become important. If I think about the most isolated small tribes becoming cannabals. As people come together they realize, "hey, we probably shouldn't eat each other, and while we're at it, we seem to not kill each other so much when we don't steal from each other." As minds meet, the best and the brightest ideas come forward and are agreed upon. People in their own self interest would rather not live with violence so we begin to instate "laws" to promote peaceful coexistance. SOme cultures are raiders such as people from the Steppes of Asia where food is more scarce. It was better for them to steal for food the Khan's and the Hun's etc. as a profesion but within the tribe there was peace at home. The further out and more scarce things got, the more extreme the behavior gets. Back to cannabalism etc. So all these cultures worship GOds, the cannabals God gets a head after the hunt. The civilized nation's God gets a tithe.