<P> During the Sixth Dynasty (2345--2181 BC) the power of pharaoh gradually weakened in favor of powerful nomarchs (regional governors). These no longer belonged to the royal family and their charge became hereditary, thus creating local dynasties largely independent from the central authority of the Pharaoh . However, Nile flood control was still the subject of very large works, including especially the canal to Lake Moeris around 2300 BC, which was likely also the source of water to the Giza pyramid complex centuries earlier . </P> <P> Internal disorders set in during the incredibly long reign of Pepi II (2278--2184 BC) towards the end of the dynasty . His death, certainly well past that of his intended heirs, might have created succession struggles . The country slipped into civil wars mere decades after the close of Pepi II's reign . </P> <P> The final blow was the 22nd century BC drought in the region that resulted in a drastic drop in precipitation . For at least some years between 2200 and 2150 BC, this prevented the normal flooding of the Nile . </P> <P> Whatever its cause, the collapse of the Old Kingdom was followed by decades of famine and strife . An important inscription on the tomb of Ankhtifi, a nomarch during the early First Intermediate Period, describes the pitiful state of the country when famine stalked the land . </P>

The collapse of the old kingdom in egypt