The Sumerians.

The article focuses on the technological and social inventions of the Sumerians. It was in their country that man built what was probably the first high civilization. Having no stone or timber, they invented the brick mold and erected cities of baked clay. To manage their irrigation systems, they developed regional government, thus, emerging from the lower social order of the family and village to the city-state. They made a written language and committed it to permanent clay tablets.