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(d) Nor sufficiently motived in private ethics, 50 3. Exhaustive character of Bentham's treatment from his point of view, 51 (a) The religious sanction (Paley), 53 (b) Limits of the political sanction, 54 (c) Uncertainty of the social sanction, 55 (d) And of the internal sanction so far as a result of the social, 56 4. Mill's logical defence of utilitarianism, 57 (a) Distinction of kinds of pleasure, 58 (b) Ambiguities in his proof, 60 5. Actual transition to utilitarianism, 62 (a) Recognition of sympathy, 64 (b) The idea of equality, 69 6. The two sides of utilitarian theory without logical connection, 73 7. Summary of the ethical consequences of psychological hedonism, 75   CHAPTER IV. MORAL SENTIMENT. 1. A uniform psychological theory not supplied by the opponents of ethical hedonism, 78 2. The non-hedonistic theory of action, 84 3. Ethics made to depend on the moral sense, 89 (a) As harmony of impulses, 90 (b) As a separate sensitive faculty, 92 (c) As an internal law, 100 4. The ethics of moral sentiment a mediating theory, 105   PART II. THE THEORY OF EVOLUTION. CHAPTER V. THE THEORY OF EVOLUTION AND THE DEVELOPMENT OF MORALITY. 1. General characteristics of the theory of evolution, 107 An assertion of the unity of life, 109 Primarily historical, but capable of ethical application, 110 2. The development of morality, 116 (a) Historical psychology, 116 Its difficulties, 117 Its result, 123 (b) Development of society, 124   CHAPTER VI. EVOLUTION AND ETHICAL THEORIES. Bearing of the theory of evolution,