“Black Mass . . . is a limpidly argued and finely written synthesis of Gray's thinking over the decade or so since False Dawn, his highly regarded and influential study of globalisation. It is not a cheering work, to say the least, and Gray's conclusions, though never exaggerated or overstated, are bleak . . . Yet the right expression of even the bleakest truths is always invigorating, and any half-sensible reader will come away from the book soberer and even, perhaps, wiser.” —John Banville, The Guardian

“Gray is right to scoff at the misplaced faith in progress propounded by Enlightenment philosophers . . . Gray reminds us about more ancient and truthful myths, which predicted that our reckless pursuit of knowledge and power would lead to disaster.” —Peter Conrad, The Observer

“When the fashionable pundits of the age of globalization are as forgotten as those who, in the run-up to World War I, predicted globalization had rendered war obsolete, John Gray's work will still matter. It is at once a reproof and an antidote to the reigning wishful thinking that makes Voltaire's Dr. Pangloss look like a realist. Gray's work has always been about separating reality and delusion. In Black Mass, Gray dissects the greatest of all political delusions, utopianism, and maps the way in which, against all expectations it has migrated from left to right, from communism to neo-conservatism. This is that rarest of things, a necessary book.” —David Rieff