Because the first people to leave a trace of the written word in the archaeological record are the people of Sumeria. It follows that if there was writing there must also have been reading of that writing!
The wheel invention
It is believed the Sumerians invented the plow.
Some say the Sumerians' greatest invention was cuneiform. Others say it was the wheel.
The invention of the plow was so important to the Sumerians because it helped farmers
The Sumerians
gulong
cuneiform witing
The invention of irrigation, the invention of cities, the invention of writing and the first monumental architecture.
The writing called cuneiform.
copper tools and bricks
plow
Some say the Sumerians' greatest invention was cuneiform. Others say it was the wheel.