...That evidence and more—from the Ice Age, from later Eurasian and Native North American groups—demonstrate, according to Graeber and Wengrow, that hunter-gatherer societies were far more complex, and more varied, than we have imagined. The authors introduce us to sumptuous Ice Age burials (the beadwork at one site alone is thought to have required 10,000 hours of work), as well as to monumental architectural sites like Göbekli Tepe, in modern Turkey, which dates from about 9000 B.C. (at least 6,000 years before Stonehenge) and features intricate carvings of wild beasts. They tell us of Poverty Point, a set of massive,...