Where did the first cities in the world appear?

The first cities in the world appeared in Mesopotamia, an ancient region located between the Tigris and Euphrates rivers, primarily in modern-day Iraq. Notable early cities include Uruk and Ur, which emerged around 4000 BCE. These cities developed due to advancements in agriculture, trade, and social organization, leading to the establishment of complex societies. Other early urban centers also arose independently in regions like the Indus Valley and ancient Egypt.