Changes

In the 4th millennium BC, the Nile, became less predictable. From around 3700 BC, the Nile may have periodically flooded more than expected while in other years floods were too low. Although the patterns of the annual Nile flood, which was critical to agriculture, had set in, the timing and fluctuations were not stable. This could have been due to fluctuating monsoon rains in central Africa that was influencing Nile flooding. It was during this time we begin to see settlements becoming larger but also more distant from the flood areas of the Nile. The settlements around Naqada become among the most important areas for Egypt in this time and develop early proto-kings that influence much of Egypt. Hierakonpolis also arose as a possible rival to Naqada. The limitation of resources that were once found in the deserts along with less predictable flooding has led some to speculate that these could have been the triggers to the social stratification and inequality that led to the rise of Pharaohs or at least kings that would have held some regional power as they competed with potentially other actors. While the Nile became more dry, this could have made the river less marshy and thus more useful for both agriculture and settlement. In other words, in earlier periods there may have been too much water, while during the the 4th millennium BC it became now suitable for major towns and cities to begin to form. There were likely some brief wet episodes during this time but in general the climate became more dry and resources and people began to be concentrated along the Nile, leading to the great social stratification and hierarchy that became associated with Egyptian civilization.<ref>For more on Nile flooding and unpredictable climate conditions, see: Hassan, F.A., 2008. Africa, North | Egypt, Pre-Pharaonic. <i>Encyclopedia of Archaeology</i>, p. 45-50. </ref>