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.

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.

I don’t think there is a better journalist than Hitchens writing in English. The power of his arguments – they’re so crisply written, they’re so forceful that, if you are on the other side, they almost strangle you. There’s nobody more compelling to read. Every time I read him, I learn something from him. His arguments are so tight, they’re hermetic. It’s very difficult to take them apart. I certainly don’t agree with him a lot of the time, but you can’t but be in awe of the way he can build an argument.

This book is a great place for people to begin who want to learn more about strategy. Gray does what he says he is going to do: he talks about modern strategy. He talks about everything from the principles of nuclear strategy to the basic fundamentals of strategy itself, the importance of Clausewitz, and of strategic context. I don’t agree with everything he says, but no strategist agrees with everything another one has to say. But his book is a great place to begin.