He studies "hunting and gathering" societies.
Hunting and gathering societies are societies that depend essentially or only on chasing wild creatures, angling, and assembling wild natural products, berries, nuts, and vegetables to help their eating regimen. Until the point that people started to train plants and creatures around ten thousand years back, every single human culture were seeker gatherers. Today, just a minor portion of the world's populaces bolster themselves in this way, and they survive just in segregated, ungracious regions, for example, deserts, the solidified tundra, and thick rain forests.
