The Anatomy of a Civilization

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Cuneiform tablet: an account of malt and barley · Sumerian, ca. 3100–2900 BCE
Two pillars in one object: a grain surplus, and the writing invented to keep track of it.

By the end of the fourth millennium BCE, the region of Sumer held well over a hundred settlements, ranging from small farming villages to Uruk, a city that may have held as many as fifty thousand people. That growth did not happen by accident. It rested on four pillars, and the first was surplus. Sumerian farmers had developed the plow, the wheel, and irrigation canals that carried river water into their fields. Fed by that surplus, some Sumerians became something new: full time priests, artisans, and rulers who grew no food at all.

The second pillar was memory. Sometime around 3000 BCE, Sumerians began pressing a reed stylus into wet clay to record grain totals and temple deliveries. That system, cuneiform, is the earliest confirmed writing system in the world. It let a city remember a transaction long after the two people who made it were gone, and eventually it let a city remember its laws, its stories, and its gods.

The third and fourth pillars, belief and rule, grew from the same soil. Each Sumerian city built its own ziggurat, a stepped temple where priests cared for the city's god, because a well-tended god was thought to guarantee the harvest. When cities went to war over farmland and water rights, their war leaders, called lugals, often kept their power once the fighting ended and became the city's first kings. By the Early Dynastic Period, Sumer was no longer a scatter of villages. It was a network of walled, ruled, literate cities competing for the same river.

Sumer was only the first of several civilizations to rise in Mesopotamia, the land between the Tigris and Euphrates Rivers. After the Sumerian city-states came the Akkadians, whose king Sargon united the region into what many historians call the world's first empire around 2300 BCE. Later came the Babylonians and the Assyrians, whose stories you will follow next lesson. Each of these Mesopotamian civilizations built on what the Sumerians started, adopting cuneiform writing, irrigation farming, and the ziggurat.

Mesopotamia sat at the eastern end of a larger region historians call the Fertile Crescent, a curved band of good farmland shaped like a crescent moon. It stretched from the eastern shore of the Mediterranean Sea, through the valleys of the Tigris and Euphrates Rivers, all the way to the Persian Gulf. Sumerian farmers kept their part of it productive by building dams and canals to control the rivers, and the food that land produced made the Fertile Crescent one of the first places in the world where cities appeared.

Adapted from Studio Aletheia's World Builders Academy curriculum library, drawing on classical world history resources on early civilizations and urban societies.