I can't find it now, but I've seen at least one claim that the ancestral-human-DNA world inside biology is fairly dominated by a clique, and if you're not seen as fully on the team you can't expect to be funded, published and so on. Which isn't to say that any specific claim is wrong, of course, and on the whole it seems very unlikely that they're far wrong on the bare facts, as opposed to more speculative interpretations.
