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People really, really like the idea of group selection but from an evolutionary perspective, it just doesn't seem to work out. People have tried it to model it, but it always ends up collapsing. The problem is precisely the "weeding out free-riders and the hidden sociopathic". Kin-selection does so automatically, since if you're cooperative, your relatives tend to be as well and if not vice versa. Furthermore, clan structures can and do weed out free-riders directly as well.
Btw, this does not mean that free association and broad cooperation is impossible long-term; It just means that you need to structure it in a reciprocal way so that everyone benefits.
I assume group selection works on bees and such? Are there any other society structures where it works? I was wondering if genocides could be such a selection mechanism, but it would have to be one's that do not involve taking all the women.
No, worker bees are sterile and afaik share half the genome of the queen, so serving the queen is in their direct "genetic interest". This is classic kin selection.
Is sterile the right word for something that can't reproduce sexually, but can still give birth? They start laying unfertilized drone eggs all over the place if there's no queen scent.
As you say, supporting the queen maximizes a worker's individual reproductive fitness, until there is no queen. Then it's every bee for herself.
Huh, you're clearly more knowledgeable about bees than I am. The queen suppressing the workers' reproduction with scent reminds of an argument I've heard; That, while the gay uncle hypothesis doesn't make evolutionary sense for the gay uncle himself, it does make sense for his siblings. Meaning, effectively castrating your brother so that he has to invest into your offspring is a viable strategy. It wasn't a very popular argument, however.
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