Q&A: Why was almost all the knowledge of Ancient Egypt lost until the discovery of the Rosetta Stone?

hieroglyphics

Ancient Egyptian paid the price of being over-exclusive. Since the skill of writing (and reading) hieroglyphic, hieratic, and demotic writing was jealously guarded by a small, exclusive caste of scribes, once the Alexandrian and Roman conquests undermined the old Pharaonic regime and made Greek the new language and culture of the elite, that skill became largely redundant, and died out with the scribes.

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