I wouldn't trust Graeber, as he is frequently wrong about easily verifiable facts in such a way that it supports his world view. There's no reason to trust a liar when he tries to tell you something you don't know about. My favorite Graeberism is when he describes the founding of Apple:

> Apple Computers is a famous example: it was founded by (mostly Republican) computer engineers who broke from IBM in Silicon Valley in the 1980s, forming little democratic circles of twenty to forty people with their laptops in each other's garages

but there are plenty others, an exhaustive list of which would be inappropriately long for a HN reply. This isn't one of those things where people don't understand computers, this is one of those things where someone just completely makes shit up. He's also a somewhat unhinged and deeply horrible person. Discussed here by Brad Delong who is about as far left as real economists come: http://delong.typepad.com/sdj/2013/04/david-graeber-april-fo...