A. W. Moore, The Evolution of Modern Metaphysics: Making Sense of Things, Cambridge University Press, 2012, p. 543: 'intellectual power and depth; a grasp of the sciences; a sense of the political, and of human destructiveness as well as creativity; a broad range and a fertile imagination; an unwillingness to settle for the superficially reassuring; and, in an unusually lucky case, the gifts of a great writer.'
