do not build cities and especially not such based on perpendicular geometries.
If we do not have a rigorous definition of civilization then it loses its meaning.
This is a critical point when discussing the rise of civilization. If we call any culture
that erects a stone a civilization then we could include a lot of cultures up to
a 100,000 years ago. But if we are rigorous and only include such cultures that
built cities and had writing then we will never find anything older than ca 5000 years.
In this the professional archeologists are right.