The responsibility for the well-being and success of the social order was shifting from gods to people, a power shift that will see-saw throughout human history until probably forever, actually. But in another development we'll see again, these kings, who probably started out as military leaders or really rich landowners, took on a quasi-religious role. How? Often by engaging in sacred marriage, specifically scoodily-pooping with the high priestess of the city's temple. So the priests were overtaken by kings, who soon declared themselves priests. Thanks, Thought Bubble. So how do we know that these kings were scoodily-pooping with lady priests?