[XII-14] Cf. W. S. Thompson, _Population: A Study in Malthusianism_, Columbia University Studies, 1915. CHAPTER XIII [XIII-1] Auguste Comte, _Positive Philosophy_, trans. by Martineau, Vol. I, pp. x, xi. [XIII-2] Ibid., p. xi. [XIII-3] Ibid., p. xv. [XIII-4] Ibid., Vol. III, p. 13. [XIII-5] Ibid., Vol. I, p. 26. [XIII-6] Ibid., p. 27. [XIII-7] Ibid., p. 34. [XIII-8] Ibid., p. 35. [XIII-9] Ibid., p. 36. [XIII-10] Ibid., p. 41. [XIII-11] Ibid., pp. 27 ff. [XIII-12] Ibid., p. 149. [XIII-13] Ibid., p. 153, 154. [XIII-14] Ibid., Vol. II, p. 30. [XIII-15] Ibid., p. 219. [XIII-16] Ibid., p. 175. [XIII-17] Ibid., p. 176. [XIII-18] Ibid., p. 180. [XIII-19] Ibid., p. 193. [XIII-20] Ibid., p. 234. [XIII-21] Ibid., p. 292. [XIII-22] Ibid., p. 287. [XIII-23] Ibid., p. 286. [XIII-24] Ibid., p. 300. [XIII-25] Ibid., Vol. III, p. 320. [XIII-26] Comte, _Positive Polity_, London, 1871, I:1. CHAPTER XIV [XIV-1] Proudhon, _What Is Property?_ Twentieth Century Press, 1908. [XIV-2] Rodbertus, _Overproduction and Crises_, Scribner, 1906 [XIV-3] Lassalle, _Science and the Workingman_, Kerr, 1903. [XIV-4] Marx and Engels, _Manifesto of the Communist Party_, Kerr, 1902. [XIV-5] Marx, _Capital_, trans. by Moore and Aveling, Kerr, 1909, I:673 ff., 834 ff. [XIV-6] Kropotkin, _Mutual Aid; a Factor of Evolution_, Doubleday, Page, 1902. [XIV-7] Henry George, _Progress and Poverty_, Doubleday, Page, 1916, p. 9. [XIV-8] Ibid. [XIV-9] Ibid., pp. 286, 287. [XIV-10] Ibid., p. 342. [XIV-11] Ibid., p. 339. CHAPTER XV [XV-1] Jean Bodin, _The Six Bookes of A Commonwealth_, trans. by R. Knoles, London. [XV-2] H. T. Buckle, _History of Civilisation in England_, Appleton, 1874, 2 vols., I:14. [XV-3] Ibid., p. 29. [XV-4] Ibid., p. 31. [XV-5] Ibid., p. 32. [XV-6] Ibid., p. 33. [XV-7] Ibid., p. 36. [XV-8] Ibid., pp. 44 ff. [XV-9] Ibid., p. 52. [XV-10] Ibid., p. 85. [XV-11] Ibid., p. 95. [XV-12] Ibid., p. 96. [XV-13] Ibid., p. 99. [XV-14] Ellen Semple, _Influences of Geographic Environment_, Holt, 1911, p. 635. [XV-15] See Ellsworth Huntington, _Civilization and Climate_, Yale University Press, 1915. [XV-16] W. Z. Ripley, _Races in Europe_, Appleton, 1899, p. 571. CHAPTER XVI [XVI-1] Charles Darwin, _The Descent of Man_, Appleton, 1904, pp. 229 ff. [XVI-2] Herbert Spencer, _First Principles_, Appleton, 1900, Section III-145. [XVI-3] Spencer, _Principles of Sociology_, Appleton, 1914, I:596, 597. [XVI-4] Ibid., p. 84. [XVI-5] Ibid., Part II, Ch. II. [XVI-6] Ibid., pp. 457 ff. [XVI-7] Ibid., Part II, Ch. VI-IX. [XVI-8] Ibid., p. 592. [XVI-9] John Fiske, _Destiny of Man_, Houghton Mifflin, 1904, p. 12. [XVI-10] John Fiske, _Outlines of Cosmic Philosophy_, Houghton Mifflin, 1874, Part II, pp. 340 ff. [XVI-11] Ibid., pp. 360 ff. [XVI-12] Ibid., pp. 303 ff. [XVI-13] Paul von Lilienfeld, _Gedanken über die Socialwissenschaft der Zukunft_, II, pp. viii ff. [XVI-14] Lilienfeld, _Pathologie Sociale_, 1904.