I say "seems to" because it is genuinely hard to tell. He will be talking about the temple-banks of ancient Sumer or the customs of the Maori, and then suddenly go off on a long diatribe about how this compares to modern banking. Hidden away in this will be a bald assertion prefixed by "of course" which left me screaming "citation needed!". If you weren't watching for it you might miss it. But once you spot it you realise that the whole of the rest of the chapter just collapsed into meaningless drivel.
I cannot think that this guy was a genius.