The Sumerian civilization was the world’s earliest civilization, developing at the confluence of the Tigris and Euphrates rivers in lower Mesopotamia in about 3500 BCE. The Sumerians had a well-organized communal life and were adept at building canals and irrigation systems. Unfortunately, the evaporation of irrigated waters led to increased soil salinity and greatly reduced agricultural yields, weakening the predominantly agricultural civilization. What form of writing did the Sumerians invent? Discuss
Source: The Free Dictionary