This strikes me as the most hilarious question, given that I’m a philosopher. Philosophy is all about respectful disagreement, and learning from disagreement. No decent philosopher simply parrots some other philosopher, so there must be disagreements somewhere in every case. I disagree less with J.S. Mill than with any other major philosopher, but I still disagree with Mill a good deal. Aristotle is insightful on some matters, not so insightful on others. As for Plato, Kant, Bentham, Sidgwick, and Rawls, my disagreements are larger, but still compatible with thinking that in some very major ways they were on the right track. I would not say that about Lord Devlin or James Fitzjames Stephen, but I still teach both, in order to learn from their arguments. If I didn’t disagree with a philosopher it would hardly be worth engaging with him or her, because there would be nothing to learn.

Even though I’m not a utilitarian, and so I tend to disagree with Singer in terms of the general framework, this book literally changed my life. I read it many years ago, in the 1990s, when I was in Knoxville, Tennessee.

I’ve read Cheney’s and Bush’s autobiographies. Books by Sarah Palin and Anne Coulter. I read articles on Breitbart.

Writers we think are all wrong and want to read anyway come in two kinds: those who are good writers and bad thinkers — Christopher Hitchens, Norman Podhoretz, and Gore Vidal, each in his terribly different way, are instances of that — and those who may not be original stylists but who we admire for trying to be better thinkers than they were before, stumbling toward truth from a starting place very different from the one we happened to inherit. I disagree, for instance, with David Frum about almost everything, from Iraq to the legacy of Pierre Trudeau in our native Canada, but never doubt his integrity or desire to tell the truth about the world.