"Pessimism claims an impressive following--from Rousseau, Schopenhauer, and Nietzsche, to Freud, Camus, and Foucault. Yet "pessimist" remains a term of abuse--an accusation of a bad attitude--or the diagnosis of an unhappy psychological state. Pessimism is thought of as an exclusively negative stance that inevitably leads to resignation or despair. Even when pessimism looks like utter truth, we are told that it makes the worst of a bad situation....