Graciously Responding to Non Sequiturs
Sam Harris parries a lot of weak criticism of his book and answers his more serious challenges.
The purpose of The Moral Landscape is to argue that we can, in principle, think about moral truth in the context of science. Robinson and Horgan seem to imagine that the mere existence of the Nazi doctors counts against my thesis. Is it really so difficult to distinguish between a science of morality and the morality of science? To assert that moral truths exist, and can be scientifically understood, is not to say that all (or any) scientists currently understand these truths or that those who do will necessarily conform to them.
[C]onsider the concept of health: should we maximize global health? To my ear, this is a strange question. It invites a timorous reply like, “Provided we want everyone to be healthy, yes.” And introducing this note of contingency seems to nudge us from the charmed circle of scientific truth. But why must we frame the matter this way? A world in which global health is maximized would be an objective reality, quite distinct from a world in which we all die early and in agony. Yes, it is true that a person like Alice could seek to maximize her own health without caring about the health of other people — though her health will depend on the health of others in countless ways (the same, I would argue, is true of her well-being). Is shewrong to be selfish? Would we blame her for taking her own side in any zero-sum contest to secure medicine for herself or for her own children? Again, these aren’t the kinds of questions that will get us to bedrock. The truth is, Alice and the rest of us can live so as to allow for a maximally healthy world, or we can fail to do so. Yes, it is possible that a maximally healthy world is one in which Alice is less healthy than she might otherwise be (though this seems unlikely). So what? There is still an objective reality to which our beliefs about human health can correspond.