What was the longest-lasting civilization?


Historical Egypt, China and Mesopotamia are all incessantly cited as long-lasting civilizations, enduring for hundreds of years. However which of those societies lasted the longest?

It seems, that is not an easy query, for just a few causes. First, fashionable historians and archaeologists do not agree on a single definition of a civilization, together with when one begins and when one ends, and lots of consultants are uncertain whether or not civilizations may be measured on this method.