Question

What made a high level of trade and economic activity possible for the ancient sumerians?

Answer 1

The introduction of writing(Cuneiform) made it possible for merchants to keep track of various trades.

Although agriculture was Sumer's primary industry, trade with distant lands flourished as well. Because the Mesopotamian plain lacked resources like metals, timber, stone, and grapevines, the Sumerians had to trade abroad to obtain them.

Cuneiform is one of the oldest known forms of writing. It means "wedge-shaped," because it was written on a clay tablet with a reed stylus cut to make a wedge-shaped mark. There have been discovered clay enveloped letters as well as works of literature such as the Epic of Gilgamesh.

Sumerian city of Uruk which advanced the writing of cuneiform.

To know more about  Cuneiform here

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