What were the contributions of the Sumerians?

The Sumerians were
an ancient people who settled in Southern Mesopotamia, now present-day Iraq, around 4500 BC. The
Sumerians were one of the first urban civilisations in world history and are responsible for a
number of important inventions and techniques:

• They invented
  cuneiform, the first system of writing that was made up of wedge-shaped strokes. Sumerian
  children then went to school to learn how to read and write this complex script - another first
  in history.
• They invented and used the wheel.
• They
  developed a system of counting that is based on 60. They used this primarily for telling the
  time, as we do today.
• They were the first people to cast and use
  glass.
• They invented a system of irrigation as a means of overcoming the
  dry and hot summers of this region and ensuring successful harvests.
• They
  wrote the first history, law and religious books.

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