The Indus valley people shared some developments—such as complex irrigation and drainage systems and the art of writing—with the people of Sumer.
There is some evidence that Mesopotamian traders reached the early people of the Indus valley by sailing there from Sumer. The Indus valley people shared some developments—such as complex irrigation and drainage systems and the art of writing—with the people of Sumer. However, the people of the Indus valley also developed a unique cultural style of their own.