The break from these later mentioned settlements and urban settlements is the emergence of Eridu , the first Sumerian city , in the Uruk period around 4000 BC .
Prehistoric Egypt and the Ubaid period of Sumer featured what some call proto - cities .
The break from these later mentioned settlements and urban settlements is the emergence of Eridu , the first Sumer city , in the Uruk period around 4000 BC .
Prehistoric Egypt and the Ubaid period of Sumer featured what some call proto - cities .