Lesson 1: Civilization Emerges in Mesopotamia

Sumerians practiced polytheism, believing many gods controlled every aspect of life, from rain to harvests. Therefore, they believed their city's survival depended on keeping the gods happy. Priests were seen as the only ones who could communicate with the gods, which gave them immense power and influence. They managed offerings and directed worship from massive temples called ziggurats, which stood at the center of every city.

The need to track temple goods led Sumerians to invent the world's first writing system. It began as simple pictographs but evolved into cuneiform, a system of wedge-shaped symbols pressed into clay tablets. Over time, its use expanded from just recording trade and taxes to writing down laws, myths, and literature like the Epic of Gilgamesh. This allowed Sumerians to preserve and share complex ideas across generations.

In Mesopotamia, the land between the Tigris and Euphrates rivers, Sumerians faced unpredictable floods and dry summers. To solve this, they engineered irrigation canals to supply water to their fields. This technology turned the dry plains into fertile farmland, creating a dependable food surplus. This innovation was crucial because a stable food supply allowed their population to grow, which directly led to the development of the first cities described in the next summary.

Initially, priests led the city-states. However, during times of war, military leaders were chosen who eventually became permanent kings. To legitimize their rule, kings claimed to be chosen by the gods, gaining support from the priests. Kings took on government duties, and some, like Ur-Nammu, created the first written law codes. These laws established rules for marriage, property, and justice, creating a more stable and organized society.

A food surplus allowed Sumerians to establish the world's first city-states, like Uruk and Ur. Each city-state was independent, with its own government, god, and protective walls. Because they lacked resources like wood and metal, they became centers for trade. Sumerians invented the wheel and sail to transport goods more easily, exchanging their extra grain and cloth for necessary materials. This trade helped create the social classes you'll read about next.

As city-states grew, Sumerian society became organized into a social hierarchy with three main classes. At the top were powerful priests, kings, and wealthy merchants. The middle class included farmers and skilled workers, who formed the backbone of the economy. At the bottom were enslaved people. This class structure was a new development for humans and was supported by both religious beliefs and the government's laws.