What development most contributed to the success of ancient Mesopotamian villages?

The most significant development that contributed to the success of ancient Mesopotamian villages was the advent of agriculture, particularly the domestication of plants and animals. The fertile land between the Tigris and Euphrates rivers allowed for the cultivation of staple crops, which created a reliable food supply. This agricultural surplus supported population growth and the establishment of complex societies, leading to advancements in trade, governance, and culture. Additionally, irrigation techniques further enhanced agricultural productivity, solidifying the villages' economic and social structures.