I'm still toying with the idea that much of the oral tradition
which was the basis for civilization before language originated
in Egypt. Cities themselves grew more to the east but the concepts
and ideas were often Egyptian.

Perhaps most of this was lost and the "integrity" of the traditions
disrupted when civilization collapsed in Egypt in drought and the re-
sulting civil strife. If they had a disastrous growing season and ate
the seed stock then most of these people would be lost and it could
take decades of immigration and repopulation to return to its old glory.

The traditions were further damaged by the efforts to create a single
church and to define everything in such terms. There was a lot of
"tweeking" with the early scriptures and beliefs to get something more
acceptable to the greatest number of people.

If there was farmland at Giza which was productive and lucrative then
as it began failing they would be far more susceptible to famine caused
by drought or excessive flooding.

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Man fears the pyramid, time fears man.