Final answer:
Egyptian kings were known as pharaohs, who were perceived as gods ruling over a unified state, distinct from the Mesopotamian city-state rulers.
Step-by-step explanation:
The pharaohs were considered by their people as not just kings, but as living gods with divine authority to rule Egypt. Unlike the warrior-priest kings of Mesopotamian city-states, Egyptian pharaohs embodied political and religious leadership, creating a strong, centralized state early on, around 3150 BCE in the Early Dynastic Period. The Egyptian kings, or pharaohs, established a bureaucratic system and a unified Egypt, with marked differences from the political systems of the Mesopotamian city-states, which were individually ruled and often engaged in conflict with one another.