Re: Ch. 1: Moral Truth (The Moral Landscape)
I think utilitarianism is a slippery enough term that it's not that useful without further explanation.
However, check out note 50 starting on p.210. Harris, paraphrasing Nozick, asks if it would be ethical for our species to be sacrificed for the unimaginably vast happiness of some superbeings, and answers "yes." The analogy being how we treat animals. As he says, the argument is not practically relevant; I'm not really sure what to make of it, but it's interesting.