" But the Egyptians believed that only prayers to the living-god pharaoh and to his heavenly patron Sobek could save the Nile Valley from devastating floods and droughts. They were right. Pharaoh and Sobek were imaginary entities who did nothing to raise or lower the Nile water level, but when millions of people believed in pharaoh and Sobek and therefore cooperated in building dams and digging canals, floods and droughts became rare. Compared to the Sumerian gods, not to mention the Stone Age spirits, the gods of ancient Egypt were truly powerful entities that founded cities, raised armies and controlled the lives of millions of humans, cows and crocodiles. "

― Yuval Noah Harari , Sapiens and Homo Deus: The E-book Collection: A Brief History of Humankind and A Brief History of Tomorrow