The evolution of language (stable processing of linguistic data in human minds) is the thing that has allowed the domain of human ability to reach beyond an individual or small kin group into a larger linguistic group, which today are “nations” or “the world”.
The point where this reaches a tipping point is the point when the creation rate of knowledge surpasses its destruction rate (due to forgetfulness or dying), somewhere in early humanity.
It seems that written media are essential for this rate to break through and bring us civilization. Absent written media (what I mean precisely is the ability to encode and decode concepts into stable forms), I wonder how different our information processing different from that of chimps. The answer should be very different!
But I’m curious how much of the difference can be attributed to the idea that humans have an inherently more stable sense of mental concepts (ie if you have the same concept a chimp will forget it in X hours but it will persist within a human for X days)? Would it be possible to guide a very special savant chimp to holding on to concepts for long durations, and would such a chimps intelligence be on par with that of a young human who has never learned to read or write? (I’m not assuming the savant chimp would be able to learn to do the encoding/decoding that is reading and writing necessary for truly long term knowledge storage).