Religion was the basic unifying factor and source of unity between Mesopotamia and Egypt. The nature evidently explained the divine forces in work and every person in these two societies worked towards the goal of serving the gods. In Mesopotamia, the Sumerians had a sole believe that the laws guiding them descended from the gods to the ruling kings. These kings then administered the laws to the people with the core support of the priests. The priests then revealed the will of the gods to the kings and the people.
Art and religion are like one thing for the artists ...