In Genesis all characters, humanoid or not, serve the god of their respective elemental alignment. It is in their best interest to be on good terms with their god, as they will be rewarded by their god for doing so. Conversely, if they disappoint or anger their god, they are likely to receive a punishment. All of the alignments carry various sets of moral rules, and breaking these rules angers their god. Following rules consistently and sacrificing one's welfare for their god are good ways to improve one's religious standing. Religion helps monitor player behavior, in a way. It doesn't stop players from doing bad things to others, but it does punish them for doing so in many circumstances.