The case of Christopher Hitchens is emblematic of so many things: how success can ruin a writer, how far an aristocratic British accent can get you on the American scene, how Trotskyism can morph into Rumsfeld-ism without any visible exertion. The former features editor of the Socialist Worker newspaper is today the Court Polemicist of the War Party, whose jeremiads now grace the glossy pages of Vanity Fair magazine. His evolution, more clearly and interestingly than any other figure, maps the progress of a new ideology, a political phenomenon unique to our time, one that is neither "left" nor "right."...