> like matrilineal lines with strong social expectations of uncles participating in childcare, for example -- there's at least one hunter-gatherer example of this I'm forgetting the name of
There is one matrilineal society with a culture that some anthropologists describe in terms you describe -- the Mosou people. However, more recent anthropological data indicates that this too is not the whole truth. While the Mosou are undoubtedly matrilineal, they typically know who the father is and children with involved fathers (rather than just involved uncles) do better. Moreover, Mosou society is not spontaneous. It developed as the result of a lower class being subjugated by a very patrilineal upper class nobility. The lower class was socially engineered to be compliant, while the upper class taxed them. The upper class was eventually disbanded by communist china, and the Mosou are now mistakenly used as an example of a stable matriarchal society. Nevertheless, even this fails to stand to scrutiny as exposure to the patrilineal mainstream Chinese society means most men just leave for greener pastures in mainstream Chinese society. Were it not for gawking tourists to prop up their economy, it's unlikely they'd be around still.
There is one matrilineal society with a culture that some anthropologists describe in terms you describe -- the Mosou people. However, more recent anthropological data indicates that this too is not the whole truth. While the Mosou are undoubtedly matrilineal, they typically know who the father is and children with involved fathers (rather than just involved uncles) do better. Moreover, Mosou society is not spontaneous. It developed as the result of a lower class being subjugated by a very patrilineal upper class nobility. The lower class was socially engineered to be compliant, while the upper class taxed them. The upper class was eventually disbanded by communist china, and the Mosou are now mistakenly used as an example of a stable matriarchal society. Nevertheless, even this fails to stand to scrutiny as exposure to the patrilineal mainstream Chinese society means most men just leave for greener pastures in mainstream Chinese society. Were it not for gawking tourists to prop up their economy, it's unlikely they'd be around still.