The earliest known civilizations arose in Mesopotamia between the Tigris and Euphrates rivers in modern-day Iraq, Persia in modern day Iran, the Nile valley of Egypt, the Indus Valley region of modern-day Pakistan and North India, and the parallel development of Chinese civilizations in the Huang He and Yangtze River valleys of China.
Smaller civilizations arose in Elam in modern-day Iran, and on the island of Crete in the Aegean Sea, as well as the Olmec civilization and the Caral civilization in modern-day Mexico and Peru.
The Mesopotamian civilization of Sumer is officially is believed to have begun around 4000-3500 BC. It ended at 2334 BC with the rise of Akkad, and is the world's first civilization.
The Egyptian civilization of the Nile Valley started at around 3200 BC. It ended at around 343 BC, at the start of the Achaemenid dynasty's control of Egypt. This is one of the three oldest civilizations in the world.
Source from : http://www.blurtit.com
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