Hypothesis: the primary evolutionary drive for the development of the central nervous system is to allow organisms to coordinate activity with their allies, aka their tribe(s).

Bear in mind that even organisms without a CNS can coordinate activity in meaningful and essential ways, the collective behaviour of slime molds being an example.

So what does the CNS add? It’s a knowledge graph that interfaces with your web of trust.

Tapestry protocol = concept graph + grapevine

concept graph = knowledge graph

Grapevine = WoT

CG and Grapevine each designed with the other in mind.

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Discussion

The purpose of a nervous system is to move. There are some sea creatures that have nervous systems when born, but then attach and never move again, digesting their nervous systems at attachment time.

Do they coordinate movement with their frens? Travel in groups perhaps?

Or do they recognize and woo their mates?

Even the most simple CNS will have an internal representation of other entities of various categories and keep track of whether each one is Good or Bad in a contextual manner. Good to eat, good to swim alongside, bad to be near bc it will attack me, good to mate with.