<Tr> <Th> Ancient Mesopotamia </Th> </Tr> <Tr> <Td> <Ul> <Li> Sumer </Li> <Li> Assyria </Li> <Li> Akkadian Empire </Li> <Li> Babylonia </Li> <Li> Neo-Assyrian Empire </Li> <Li> Neo-Babylonian Empire </Li> <Li> Median Kingdom </Li> </Ul> </Td> </Tr> <Ul> <Li> Sumer </Li> <Li> Assyria </Li> <Li> Akkadian Empire </Li> <Li> Babylonia </Li> <Li> Neo-Assyrian Empire </Li> <Li> Neo-Babylonian Empire </Li> <Li> Median Kingdom </Li> </Ul> <Tr> <Th> Classical antiquity </Th> </Tr>

Conquered the sumerians in 2350 bc and introduced the concept of divine monarchy