Africa 4 million BC: Earliest humans in East Africa World Prehistory Chronology ca. 2, 000 BC: Agriculture is developed in the Niger River Valley. 3200-30 BC: Ancient Egypt 3100-2686 BC: The Early Dynastic Period 2686-2181 BC: The Old Kingdom 2181-2040 BC: The First Intermediate Period 2133-1786 BC: The Middle Kingdom 1786-1567 BC: The Second Intermediate Period 1567-1085 BC: The New Kingdom ...