Originally Posted by hydrotoxin

One must keep in mind that early peoples were scavengers and hunters, and did not have time to formulate religions because they were too busy trying to survive. Early evidence suggests that these early people killed each other for dominance of the group- obviously goes against what you're saying about "killing your own" laws. However, with the rise of agrarianism and early river valley civilizations during the Neolithic era, people began to settle down in early cities and villages semi-permanently, thus creating religion, and as an extension of religion, a moral code, although obviously the intention was to try and get indigenous peoples to STOP killing each other. You must remember that early kings were warrior-folk, not scholars, until this period. To change that, the intellectuals of that era couldn't have just said "Oh, ok guys, this is wrong, lets stop and think". So they invented deities to control the people of these early cities (evidence strongly suggests that priests were nearly equal in power to kings), and from these deities comes modern religion. I should have elaborated in the first place.