I don't understand what this is all about.
This is a model. It doesn't say anything about how things should be. It is an observation of how things are.
People can decide to live like that.
The theory suggests that they often form their groups like that.
People have a mind, they can decide and they do things that are artificial all the time. This is one of them.
This is just like morals. Not killing others or having to tell the truth are just artificial constructs that we could do without but decide to live by for some reason. Morals aren't natural either. We learn them, usually, but we can just stop having them right now.
This model of group roles is also just a construct that people might decide to live by for some reason.
I asked whether they do and whether autistic people or very hf autistic people have such group dynamics too?
So do they or do they not?
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Autism + ADHD
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The trouble with having an open mind, of course, is that people will insist on coming along and trying to put things in it. Terry Pratchett