Our English word "paper", is derived from the word "papyrus", an Egyptian word that originally meant "that which belongs to the house" (the bureaucracy of ancient Egypt). At about the same time as the ancient Egyptians moved from prehistory to history by developing a written language, they discovered the need for a medium other than stone to transcribe upon. They found this in their papyrus plant, a triangular reed which symbolized ancient lower Egypt. It was light, strong, thin, durable and easy to carry, and for thousands of years, there was nothing better for the purpose of writing. The earliest extant documented papyrus comes from Egypt's 1st Dynasty, but we believe it may have been used as early as 4,000 BC. It's use continued until about the 11th century AD.
The delusional narcissistic notions of the pharaohs eroded the economy over time. By conjuring ideas of god like grandeur these self-righteous monarchs began to waste precious resources on vain projects such as the pyramids. In addition to this by perpetrating to be the god king who could control the flooding of the Nile these pharaohs destroyed the empire as necessary precautions for drought were not taken. I propose that the reason the Egyptian civilization fell is because they believed too much in the power of a single man and didn't invest enough time in researching options in case of drought. I base this argument from the data discussed in Gabriella Polletta's Movie, why ancient Egypt fell, where Dr Faker Hassan explains how the Pepi I and II signed pacts with the people to maintain the flooding of the Nile on which their livelihood depended. By keeping the people in a state of confidence no precautionary measures were taken to survive a drought. This was the beginning of the downfall.