Thanks so much for reminding me of this thread.
I want to add by categorizing a few different ways of telepathy and the way this allows people to organize.
Meta-Human Observational Deduction - the most primitive, elementary form of telepathy but the most difficult to master. It stands to reason that meta-humans, being in total control of their bodies and minds, are capable of laser-focusing on the subtle subconscious actions of themselves and others they observe, and can deduce exact thoughts at a glance. In this way meta-humans can transmit and receive each others' thoughts, wordlessly, but only as long as there is some degree of effort being expended on observation.
Pheromones - plushumans can acquire gland implants and use them to subconsciously influence or communicate with others.
The Man What Hath A WiFi In His Skull - pretty self-explanatory - electronic machine-to-brain interface. Capable of transmitting and receiving thoughts electronically, possibly known colloquially as psionics or psytronics (psychic+electronic). The most ubiquitous form of mental communication.
Organizing a Telepathic Society
- Eusociality - the highest order of social organization in the animal kingdom, anyway. Pop is arranged into castes which tend to the needs of a central leader or leaders, probably not breeders like other animals though because let's be real. Might have a neofeudal vibe.
- Total Democracy - Pop keeps their individuality but constantly votes by having their thoughts read by machines - some agent enacts changes within the society that are most pleasing to the mean.
- Totalitarian Control - Pop keeps no individuality and acts under the dictatorship of a central leader, possibly a machine or egomaniac transhuman of some sort. Likely goes by "Overmind".
- True Hivemind - Pop keeps no individuality and is under no authority - each pop is like a neuron in a vast emergent brain, which then dictates actions on an individual level, as though a billion bodies share one mind. Likely goes by "me / I".
If I'm missing something or anyone has ideas to add, please do.