It doesn’t. Graeber was an anthropologist and Wengrow is an archaeologist. It’s a review of existing evidence from past civilizations (the diversity of which most people are hugely ignorant about), making the case the most common representations of “civilization” and “progress” are severely limited, probably to a detrimental extent since we often can only base our conceptions of what is possible on what we know.
Nobody should be paid that much but he’s an outlier for the industry in allowing hybrid work at least.