Answer: Literacy.
Explanation:
Throughout history, many civilizations have had their forms of literacy. These primitive letters represent a turning point in humanity's history; that is, the transition from prehistoric to historical times. Various primitive forms of literacy have developed throughout histories, such as pictorial or cuneiform, Egyptian hieroglyphs, and the like. The modern form of literacy was revived by the Phoenicians in North Africa (today's Tunisia).
The book of the dead is the answer
I'm pretty sure it's “They exchanged one thing for another” like trading. Hopefully it's right.
