How did slavery begin in the world?

How did slavery begin in the world? Slavery operated in the first civilizations (such as Sumer in Mesopotamia, which dates back as far as 3500 BCE). Slavery features in the Mesopotamian Code of Hammurabi (c. 1750 BCE), which refers to it as an established institution. Slavery was widespread in the ancient world.

Slavery operated in the first civilizations (such as Sumer in Mesopotamia, which dates back as far as 3500 BCE). Slavery features in the Mesopotamian Code of Hammurabi (c. 1750 BCE), which refers to it as an established institution. Slavery was widespread in the ancient world.