In contrast to Egyptian or Shang civilizations, where the centralized ruler was virtually indistinguishable from the gods, the insecure kings of Mesopotamia made no attempt to assert divinity. The most they could claim was to act as stewards of the gods, and everyone recognized they would be punished by military defeat if they failed to do their job well. This separation of the king from divinity led to a process of secularization, during which the political domain was gradually recognized as separate from the cosmological.
Separation from king to divinity. Politics is not linked to colsmology
