Darwin, C., 35 ff., 39 ff., 57, 60, 62. 
Degrees of reality, 103 ff. 
Descriptive ethics, 76 ff.
  theory of science, 129. 
Desire and goodness, 90 ff., 102, 110 ff. 
Distinction of good and evil, 93 ff., 113.

Egoism, 15 ff., 74 f., 118. 
Empiricism, 3.
Ens reale, 102.
  realissimum, 102. 
Environment, moral, 70 ff. 
Epicurus, 17. 
Eternal mind, the, 96 ff. 
Ethical controversies at present day, 13 ff.
  in nineteenth century, 1 ff. 
Ethical unity of things, 133 ff. 
Ethics of evolution, 36 ff. 
Evolution, ethical significance of, 51, 67 ff. 
Evolution of ethics, 36 ff. 
Evolution, theory of, 33 ff., 36 ff. 
Exceptional cases, 11. 
Experiments in morality, 50.

Fichte, J.G., 87. 
Fittest, survival of the, 35, 69 ff.

Galt, J., 4 n. 
Good, the true, 92 ff. 
Goodness as appearance, 102 ff. 
Goodness as contradictory, 117. 
Green, T.H., 77 n., 89 ff., 123. 
Guyau, 125 f.

Halevy, E., 4 n. 
Hedonism, 100. 
Hegel, 87, 104, 123. 
Higher and lower, 107 ff. 
Huxley, T.H., 45 ff., 68.

Ibsen, 31. 
Idealism, 87 ff. 
Ideals, need of, 125. 
Illusions as ideals, 127. 
Immoralist, 24. 
Individual and group, 40 ff. 
Influences forming ethical thought: 
  current morality, 26 ff.
  science and philosophy, 32 ff. 
Intelligent selection, 61 ff., 80. 
Intuitionism, 2 ff., 81.

Kant, 87, 123, 127 f.

Lange, F.A., 125. 
Leibniz, 87.

Material and moral progress, 29 f. 
Mechanical unity, 133. 
Metaphysics, 82, 85 ff. 
Mill, J.S., 3 n., 8 ff., 28. 
Modifications of general rules, 9. 
Monism and ethics, 109. 
Moral consciousness and reality, 128.
  environment, 70 ff.
  experience, 131.
  ideas, origin of, 1 ff.
  order and cosmic process, 46 ff.
  value, criterion of, 1 ff., 75.

Natural selection, 35, 43 ff., 49.
  in morals, 55. 
Naturalism, 83 f., 86 f. 
Nietzsche, F., 18 ff., 31 f.,
  47 ff., 67., 127. 
Nobles, morality of, 20.

Origin and validity, 37, 97. 
Over-man, the, 22, 31. 
Owen, Sir R., 59.

Physiological interpretation
  of life, 67, 76. 
Plato, 31, 87. 
Practical nature of knowledge, 128. 
Pragmatism, 130. 
Progress of life, 34. 
Progressive morality, 9. 
Psychological ethics, 109 ff. 
Purposive selection, 61 ff., 80.

Rational unity, 133. 
Religion, 82 f., 136. 
Renaissance, 33.

Science and metaphysics, 85. 
Self-assertion, 116 ff. 
Self-love, 17. 
Self-realisation, 90 ff., 113 ff. 
Self-sacrifice, 116 ff. 
Selfishness, suppression of, 136. 
Sensationalism, 100. 
Sensualism, suppression of, 135. 
Servile morality, 20. 
Sexual selection, 66. 
Sidgwick, H., 16 f. 
Social qualities, 40 ff. 
Sophists, the, 27. 
Spencer, H., 44, 47, 51, 73, 122. 
Spinoza, 87 f. 
Stephen, Sir L., 44. 
Subjective selection, 60, 66, 80. 
Subjectivity in ethics, 81.