The Rise of Civilizations
Civilizations began to rise in river valleys. The first four civilizations were located in the Tigris & Euphrates River Valley, the Nile River Valley, the Indus River Valley, and the Yellow River Valley. The Sumerians, in the Tigris & Euphrates River Valley, gave us the first form of writing, known as cuneiform. This coincides with the beginning of the Bronze Age and the beginning of history.