Orwell wrote a critique of modern society, soviet Stalinist society in particular, in animal farm. It's not an anthropology book, it's political satire that came from a socialist (!). I am not sure your induction that it applies to all humans under every circumstance was therefore intended by the author (lord of the flies might be a much better example in this case).

Graeber is actually far for boring, and as an anthropologist his writing tend to be a bit more general.

Either way, of course I've read Animal Farm.