The legends of Adapa, Enmeduranki, and Etana are the tales of three very early kings, though tales that don't seem to come around until the middle bronze age, and they are in a sense creation myths but most importantly they are moral stories in the broader genre of wisdom literature. They show us how the earth and heaven is ordered in the Mesopotamian world view, and they show us what is good and evil in a person's behavior, though it also seems to show us that sometimes evil doesn't really get punished all that much, if the evil person happens to be useful. Online at oldeststories.net