Sumer, or the ‘land of civilized kings’, flourished in Mesopotamia, now modern-day Iraq, around 4500 BC. According to the ancient texts, each Sumerian city was guarded by its own god; and while humans and gods used to live together, the humans were servants to the gods.
The Sumerian creation myth can be found on a tablet in Nippur, an ancient Mesopotamian city founded in approximately 5000 BC.