Could the hivemind be driven by whoever has the most pleasant and positive sounding opinion?
It's clear that the hivemind doesn't behave like the average person (way too friendly and unselfish), or have the average person's value system (most people are fine with killing animals and plants in order to eat).
I had been assuming that the aliens imposed certain strict values on the hivemind like the no killing rule. Or maybe all of the humans are essentially braindead, just puppets of an alien who is remotely controlling them and has access to their memories.
But if it is just humanity, why won't they kill? Why do they love Carol's writing so much? Why are they so friendly? It doesn't seem to be a democracy in the plurb.
I think it's possible that whoever is the happiest, friendliest, and most peaceful and positive-sounding has control. If there's any level of individuality left in people, their opinions like "maybe we should farm food to stay alive" are being ignored. Only the happiest and most peaceful opinions get counted, no matter how much harm it causes.
The hivemind was created by a genetic code that's essentially like a computer program, and that program could come with certain rules that override the default behavior.
It reminds me of the Slylandro probes in Star Control 2, if anyone remembers that game. The friendly Slylandro aliens sent robotic probes out to explore the galaxy and make friends with other species. The probes could also collect metal and create duplicates of itself, and the Slylandro set that as a high priority so that they could have lots of probes and explore the galaxy much faster that way.
The result was that the probes would meet you (the player), say "we come in peace" and initiate a polite discussion, and then attempt to destroy your ship so they can use the metal to make more probes.
I wonder if a friendly alien wanted to make the human hivemind as happy and successful as possible, and had a disastrous programming error, not realizing that this could result in the hivemind refusing to feed itself.