I still find it hard to believe. You're essentially saying people don't believe the Egyptians had a hierarchical system.Wrong. Heaps do. Eg there is a common belief that things like the caste system didn't exist in India until the Brits arrived. Which is absolutely wrong.
There are the tabula rasa and noble savage beliefs, which rest on the belief that civilisation is 'fallen' in some way and we have deviated from a pure nature.