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jhuffman comments on On the unpopularity of cryonics: life sucks, but at least then you die - Less Wrong
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Well that is certainly a lot for me to learn more about. Sorry I missed this post. How much of this has been directly observed in modern forager societies versus inferences from archaeology?
There's a lot of other studies about different passive fertility in forager groups that bear out the cross-cultural applicability of the San studies as well. Forgot to add that.
Studies of forager groups on several continents have come to the same basic conclusions around that. Some of those findings are summarized here: http://books.google.com/books?id=grrA421tRNkC&pg=PA431&lpg=PA431&dq=foragers+and+menarche&source=bl&ots=WNuoQO-gYV&sig=h1ahBo5ApBv4Q9uYxD47pM_whNM&hl=en&ei=NtBNTpzkFeOssALYip3rBg&sa=X&oi=book_result&ct=result&resnum=3&ved=0CDAQ6AEwAg#v=onepage&q=foragers%20and%20menarche&f=false
The bits about breastfeeding and the other biological limiting factors (the indirect controls, basically) came to light during Richard Lee's fieldwork with the San and Ju/'hoansi peoples of South Africa in the 1960s.
The bit about active measures is available if you peruse the anthropological literature on the subject (I don't have a specific citation in mind), and the sort of thing covered in introductory classes to the field -- it's common knowledge within that domain.