“Principles of Population, The,” by T. R. Malthus, _see_ “Population, The Principles of” “Probability, the Foundation of Eugenics,” by F. Galton, 315 Progress, acquired, _see_ Acquired progress ---- defined, 50, 303 ----, evolution and, 48 ---- of achievement, and of the race, 4 ----, racial and acquired, 262 “Progress, Population and,” by Montague Crackanthorpe, 315 Promiscuity among animals, 163 Public opinion, education of, 14, 15 Quality _versus_ quantity, 293 Race, immortality of, 256 ---- _versus_ individual, 256 Race-culture and human variety, 297 ----, education and, 120 ----, socialism and, 133 ----, the promise of, 287 “Race-Culture or Race Suicide,” by R. R. Rentoul, 316 “Race Prejudice,” by Jean Finot, 318 Racial degeneration and natural selection, 260 ---- ----, cause of, 263 ---- ----, the Lamarckian theory of, 258, 263 ---- instinct, education of the, xii ---- poisons, the, x, 246 ---- ---- and decadence, 259 ---- ----, bibliography of, 318 “Racial poisons,” introduction of the term, 205 “Racial Hygiene or Negative Eugenics,” by Dr. Saleeby, 205 Racial senility, the fallacy of, 256 “Reformatory,” the word, 238 Regression towards mediocrity, the law of, 288 Religion, eugenics and, 303 ----, the survival-value of, 303 “Religion, Eugenics as a Factor in,” by F. Galton, 315 Religious persecution, non-eugenic results of, 116, 264 Reproduction, the cost of, in energy, 87 “Republic, The,” of Plato, 166, 313 “Restrictions in Marriage,” by F. Galton, 185, 204, 315 Reversed selection, 265 ---- ----, the final cause of racial decay, 264, 266 ---- ----, war a cause of, 284 “Reversion,” defined, 111 Rome, the decline of, 281 ----, motherhood during the decline of, 270 Russia, increase of population in, 76 ---- as a wheat-producing country, 80, 81 “School hygiene”, 65 “Scope and Importance to the State of the Science of National Eugenics, The,” by Karl Pearson, 315 Selection, alcohol an agent in, 206 ---- and racial change, 260 ---- by marriage, 189 ---- for parentage, vii, viii ----, natural, _see_ Natural Selection ---- of mind, 52 ---- of woman, for marriage, 189 ----, reversed, _see_ Reversed Selection ----, sexual, 67, 190, 197, 202 ----, the principle of, education in, 137 “Sex and Society,” by W. I. Thomas, 317 “Sex, The Evolution of,” by Patrick Geddes and J. Arthur Thomson, 312 “Sexual Choice”, 314 Sexual education of children, 139 ---- ---- of girls, 318 ---- selection, 67, 190, 197, 202 “Sexual Selection in Man,” by Havelock Ellis, 202 “Sexuel Frage, Die” (The Sexual Question), by August Forel, 130, 242, 253, 320 Siegfried, the story of, 304 “Social Psychology,” by Dr. McDougall, 117 Socialism and education, 129, 130, 132 ---- and marriage, 198 ---- and race-culture, 133