I've been reading an anthropology about the Australian aboriginals, The Native Tribes of Central Australia (Baldwin Spencer/Francis James Gillen, 1899), and found some parts interesting enough to share them.
Content warning: description of gruesome (though consensual) mutilation.
Things that stood out about the aboriginals (highlighting not in the original text):
* Aboriginals experienced nocebo effects strong enough to result in death, even from mild injuries, if the weapon causing the injury was believed to be enchanted [1]
* Each aboriginal man had the right to at least one wife [2]
* Aboriginals were very good at tracking, for example easily able to distinguish individuals from their tracks [3]
* The central Australian aboriginals plausibly had a form of specialization/division of labour independent of differences in supply of resources [4]
* Aboriginals had a lot of rituals resulting in injuries, sometimes gruesome ones, the cost of not engaging in these rituals in ridicule, which is highly aversive [5]
* The most shocking one was penile subincision (extra content warning, very unpleasant images of mutilated penises)
* Basically, penile subincision is a cutting-open of the urethra along the length of the penis starting from the tip, differing in how far it is cut [6]
* Very surprisingly to me, many men who willingly undergo the subincision a second (and even third!) time [7]
* In order to become capable of magic, aboriginals would make a hole in their tongue [8] (without, apparently, any guidance on how to do that) and push small stones far under their fingernails [9]
* One minor ceremony involved the knocking out of one or more teeth, both in men [10] and women [11]
* Commentary: I find it interesting in how gruesome and costly social signals can become, penile subincision is quite fitness-reducing (ejaculate flows out along the subincision), but there are so many things Australian aboriginals do that reduce fitness by a large amo