Parts of this story are great, but it is mixed in with some overly romanticized dreck. Unfortunately, Thomas's strong bias means that even the great parts need to be taken with a grain of salt. Her descriptions are biased and exaggerated, and I don't know enough to determine how much is real.
On Ju/wasi unimaginably vast knowledge of their environment,
> Over the millennia, inaccuracies were filtered out, leaving the oldest and purest scientific product—solid, accurate information that had often been put to the test.
For example, she lauds the Ju/wasi for the great care they take in securing their poisoned arrows from their children. Never in her whole stay was anybody accidentally killed. They are so much more careful of human life than we Westerners with our guns. (If people her neighborhood are being regularly shot, then this is understandable. Where does she live?!) Then again, a hundred-odd pages later, she describes one incident where a child kills someone else with a poisoned arrow, and then a second incident where she herself is stabbed by a child with a poisoned arrow. Huh?
Unlike dirty Westerners, the Ju/wasi bushmen valued their elders:
> the Ju/wasi felt differently, for a very good reason. The older someone is, the more that person remembers about what happened before the rest of the group was born, events that, without written records, would be lost if someone couldn't describe them
A few pages later, Thomas describes how after someone is too old to contribute food, a group might abandon them to be eaten by hyenas. Oh.
Several times Thomas talks about how we are all descended from chimpanzees. She often speculates wildly about how the "Old Way," practiced by the Ju/wasi, is a better and evolutionarily more fit way of life. The ending, about the end of the Ju/wasi's culture, is rather sad. (It is also poorly written, with Thomas trying to describe in words a documentary that her brother made.)
> A man went off alone into the veld and crawled into an aardvark burrow. Obviously, he was not entirely sane. When people passed by, he would burst out of the burrow and shout at them. The passersby were very startled, of course, which others later said was the disturbed man's intent—he wanted only to scare them away, not to hurt them. Nevertheless, the people pondered what to do about this man in his burrow and eventually decided that he was too dangerous. So a few of the men sought him out and killed him. … Thus as I see it, if my minuscule sample counts for anything, two of the five known killings were safety measures, conducted out of necessity, not as the result of anger or loss of control.
> It was the Old Way, the dark side of the Old Way. We were not sure what happened to this man, but we didn't see him again. Better to marry, because your partner will help you. Better to connect to your partner's people, because they will help you. Better to connect to the next generation by having children and grandchildren, because they will help you, and their partners will help you, and their partners' people will help you. Better to be part of the social fabric. That, too, was the Old Way.
> The farmer captured many of the people and made them get into the back of his truck. Among his captives was Toma, who was too weak to resist. The farmer took these people back to his farm.
> Perhaps firm marriage belongs to the Old Way. It certainly was the way of the Ju/wasi. My mother wrote, "Divorce is untoward, disruptive; it can cause trouble. Anything other than peace and harmony in human relations makes the Ju/wasi uneasy. The instances of strife (that we observed) were breaks in their predominantly peaceful, well-adjusted human relations."
> the Ju/wa children were every parent’s dream. No culture can ever have raised better, more intelligent, more likable, more confident children.
> when babies first talked, they didn’t use the clicks. That also was developmental and came later, first with just one click, which some babies seemed to substitute for all the clicks
> With the possible exception of certain articles of clothing (the Ju/wasi did not have spare clothes), almost every object in Nyae Nyae was subject to xaro, received as a gift from someone else, to be given as a gift to another person later. … You could never refuse a gift, although it obligated you, and you had to make a gift in return, but not immediately. A return gift made too soon would seem like a trade, not like a gift made from the heart, and thus would not strengthen the social bond, which was its purpose. This concept was so strong that the Ju/wasi never traded with one another. Trading was acceptable, but only with different people.