I remember reading this in AP World History class. Basically, it's a book about a gorilla explaining a neo-tribalist argument to a human. Overall, it gives a pretty rosy view of going back to a hunter/gatherer existence, so if you wanted some balance to the author's arguement, you're not going to get it from "the student," who's only purpose is to be
The Watson. But if you want a more realistic view of tribalism, read Things Fall Apart, by Chinua Achebe.