The Psychology Behind J. S. Mill's ‘Proof’

Abstract

Professor J. B. Schneewind's recent excellent volume Mill's Ethical Writings has drawn attention to the necessity of studying Mill's notes to chapter XXIII of his father's Analysis of the Phenomena of the Human Mind for a clear understanding of his theory of the moral sentiments. There are notes, however, by J. S. Mill to other chapters of that work, which should not be forgotten, because they elucidate the associationist theory of motivation which is obscurely appealed to in chapter IV of Utilitarianism. Critics of Mill from F. H. Bradley onwards have made erroneous statements about the psychology that underlies Mill's justification of the principle of utility. But if Mill was going to support his ethics with a psychological theory, he should have expressed that theory at length and unambiguously in his ethical treatise. In what follows, it is pointed out where critics have been unfair to Mill through their apparent ignorance of his notes to the Analysis and of his conception of sympathy; but it is also shown that there is a puzzling inconsistency between the notes and a key passage in Utilitarianism, chapter IV. Finally, the theory of habitual volition, which is expressed at the close of that chapter, is examined. Critics have paid little attention to this theory, but it entails a serious modification of psychological hedonism, and Mill obviously attributed great importance to it.