The Old Kingdom collapses
The end of the Old Kingdom, around 2100 BC, seems to have been caused by a major climate change. In Egypt, there was a terrible drought – the Nile failed to flood, or flooded less than usual, so there wasn’t enough water to grow enough food.
Egyptian government changes
Then food shortages led to rebellions among the nomarchs – the governors and rich people. They thought that the Pharaohs weren’t doing a good job. (Technically they were still called kings and not pharaohs yet.)
During the Old Kingdom, the Pharaohs had gotten more and more dependent on the government officials under them. Now these government officials grabbed power. Some of the organization of the country collapsed, and everybody was poorer.
What happened to ordinary people?
Nobody could afford to build pyramids or fancy palaces anymore. Egyptian writers make it sound really awful to live through. Rich men and women were working in the fields. The First Intermediate Period was a terrible time to be around in. People were killing their parents, brothers were fighting, and tombs were destroyed. Probably a crisis that was hard on rich people was much harder for ordinary people.
Crisis in West Asia and Central Asia too
This terrible drought in Egypt also affected West Asia, where the Akkadian Empire fell apart. Here, too, people were not as rich as they had been before. There were a lot of wars.
The crisis seems to have affected Central Asia too. In Central Asia, the climate crisis may have forced the Yamnaya to begin a great migration and spread out all over Europe and Asia.
India seems to have felt the effects of this crisis too. There, the Harappan civilization collapsed. Again, there were several hundred years where people were poor and there were a lot of wars.
Eyewitness: Ancient Egypt, by George Hart. Easy reading.
The Oxford History of Ancient Egypt, by Ian Shaw (2002).
History of Ancient Egypt: An Introduction, by Erik Hornung (1999). A college textbook. On the conservative side – not much on new developments.
Ancient Near Eastern History and Culture, by William H. Stiebing (2002). Expensive for a paperback, but brief and very up to date. And yes, it includes Egypt in the Near East.