Considering from a political point of view, both of ancient Japanese and Sumerians seems to have had common sense that their nations ought to be governed righteously. For example, the reason why Susanow-no-mikoto, a cry-boy deity, was expelled from the Takama-no-hara was that he failed to endow people living in the nation with well-being and prosperity. On the contrary, Susanou-no-mikoto came to be revered by people later, because he succeeded to govern the Izumo-no-kuni well.
Japan history politics
religionculture