This culture emerged out of nowhere, and now we can not say a lot about the Sumerians. The Sumerian civilization discovered many valuable inventions for the world. The inventions of the Sumerians include writing, agricultural implements, brewing and the bicycle.
Strange remains how the Sumerians were able to do all this so many millennia ago. The Sumerian civilization is the oldest civilization and was undoubtedly amazing. There is even a case being made that they met with an alien civilization.
Their knowledge puzzle scientists today - Sumerians used a three-fold system of calculation, had great knowledge of chemistry, physics, astronomy, and knew Fibonacci numbers. Their skills were really great. It is believed that the Sumerians knew about Pluto, Uranus and that their knowledge of mathematics can exceed even the knowledge that we have today.
They had elections, through which they chose who would rule, they even had a jury. Sumerians were protected because they had rights.
Their first settlements appeared 4 000 years BC, grew quickly and managed to grow into city-states, which were independent of each other.
They started fighting among themselves. Major cities of Sumer were Nippur, Eridu, Kish lag Ur. The head of every major city was a ruler - a king and a priest, or deity. Sumerians traded much among themselves as well as with India and Egypt. The Sumerian civilization was rich and therefore had often been attacked by the Persian tribes.
The king of Ur took power in Sumer around 2600 BC and Lugalanemundu - who's next ruler was able to add to the Sumerian nation lands from the Mediterranean region to Iran, and the king of the Mind - Lugalzagesi managed to reach the Gulf in XXIV BC.
Sargon the Great created the first empire in the world. He conquered much of Summeria in the middle of the III millennium BC.
Summeria was finally captured in 2000 BC, by the Babylonian Empire, which rapidly gained strength and grew.