Marriage, institutions of, 65, 202, 289, 330. Plato’s conception of, 90. Aristotle’s conception of, 109. Jesus’ conception of, 131, 132. Marx, 234 ff. Martineau, Harriet, 212. Materialism, 222. Mathematics, 217. Maternal love, 291. McDougall, William, 395. Mead, G. H., 409. Meliorism, 293. Mencius, 49. Mendelian laws, 327. Mental defectiveness, 430. Mercantilism, 187 ff. Metaphysics, 215. Methodology, 487. Micah, 61, 72. Middle classes, the, 107, 465. Militarism, 215. Mill, James, 194. Mill, John Stuart, 194, 212. Miscegenation, 334. Monasteries, 150. Money, love of, 162. Money-making, 287. Monotheism, 213. Montesquieu, 184, 247. More, Thomas, 155 ff., 173, 367, 476. Morris, William, 168. Moses, 55. Moral restraint, 208, 430. Morality, 293, 342. Mores, 313. Morley, John, 212. Motives, 307. Mutation, 328. N Natural selection, 259, 410. Newton, Isaac, 368. Nietzsche, 193, 341. Negro, 335, 438, 472. Novicow, 249. O Old Testament social thought, 55 ff. Oligarchy, 98. Opposition, 373, 377. Orano, P., 381. Organic analogies, 365 ff., 478. Organization, 363, 386, 406. Osborne. T. M., 429. Owen, Robert, 230, 354. P Pain economy, 344. Paine, T., 187. Parental negligence, 431. Patten. S. N., 343. Patriotism, Hebrew, 71. Paul, Saint, 138 ff. Peace, universal, 72. Penn, William, 428. Penology, 166. Pearson, Karl, 326. Pericles, 77. Personality, 336, 353, 392, 467. Persian social thought, 52 ff. Pestalozzi, 442. Petrarch, 173. Pharaoh, 57. Philosophical thought, 16. Physical education, 96, 110. Physics, 218. Physiocrats, 181. Pittsburg Survey, 483. Plato, 74 ff., 203, 367, 476. Pleasure economy, 344. Pluralistic behavior, 386. Polybius, 112. Polygamy, 38. Polytheism, 213. Poor-laws, 204. Popenoe, P., 326. Population theories, 199 ff., 250. Portuguese social proverbs, 31. Positivism, 214, 477. Pound, Roscoe, 197. Poverty, 59 ff., 91 ff., 107, 108, 133, 155, 190, 423, 425, 442. Practicalism, 12. Prevision, 222. Priestcraft, 288. Primitive people, 20 ff. Prisons, 428. Profitism, 402, 434. Progress, 281, 299. Proletariat, 237. Property, 102, 132, 229, 232, 234, 285. Proudhon, 229. Proverbs, Book of, 169. Proverbs, social, 23 ff. Psychology, 319. Public health, 109, 160, 438. Public opinion, 393. Punishment, 94, 166, 429. Pure sociology, 28. Q Quetelet, 480. R Race equality, 303, 321, 334, 340. Racial conflicts, 305, 438. Racial intermarriage, 303. Rationalism, 213. Rauschenbusch, 455 ff. Ratzel, 254. Ratzenhofer, 350, 357. Reform, social, 402. Religion, 97, 353. Religious education, 164, 472. Religious thought, 15. Renaissance, 173. Republic, Plato’s, 74. Reproductive forces, 289.