 Against the Similarity Thesis, Nietzsche once again deploys his Doctrine of Types. Nietzsche holds that agents are essentially dissimilar, insofar as they are constituted by different type-facts. Since Nietzsche also holds that these natural type-facts fix the different conditions under which particular agents will flourish, it follows that one morality cannot be good for all. “Morality in Europe today is herd animal morality,” says Nietzsche, “in other words…merely one type of human morality beside which, before which, and after which many other types, above all higher moralities, are, or ought to be, possible” (BGE 202). Nietzsche illustrates the general point with his discussion of the case of the Italian writer Cornaro in Twilight of the Idols (VI:1). Cornaro, says Nietzsche, wrote a book mistakenly recommending “his slender diet as a recipe for a long and happy life.” But why was this a mistake? Nietzsche explains: