Narcotics, irritant and non-irritant, 251 ----, possible racial influence of, 250 “National Life from the Standpoint of Science,” by Karl Pearson, 279, 315 “Natural Inheritance,” by F. Galton, 308 Natural selection, 35 _et seq._ ---- ---- and racial degeneration, 260 ---- ---- _versus_ acquired progress, 266 Nature, the cruelty of, 38 “Nature,” defined, 110 “Nature of Man, The,” by Metchinkoff, 90 Navy, superior intelligence of the, to that of the Army, 98 “Nemesis of Nations, The,” by W. R. Paterson, 281 New Zealand, control of drunkards in, 242 Nicotine, racial influence of, 251 Nietzscheanism, eugenics and, 28 Nitrogen, the fixation of, 81 “Noteworthy Families”, 114 (_note_) “Nurture,” defined, 110 “Obstacles to Eugenics, The,” by Dr. Saleeby, 175 (_note_) Opinion, individual, power of, 138 ----, public, the education of, 14, 15 ----, the creation of, 138 Opium, possible racial influence of, 251 “Ordeal of Richard Feverel, The,” by George Meredith, 112 (_note_) “Origin of Species, The,” by Charles Darwin, vii, 73 (_note_), 311 “Origin of Vertebrates, The,” by Dr. W. H. Gaskell, 50 (_note_) Overcrowding, 20 ---- and tuberculosis, 181 ---- and unemployment, 293 Parenthood, alcohol and, 241 ----, classification of society for, 104 (_note_) ----, education for, xii, 138 ----, eugenic power of, 199 ---- of inebriates, 220 ----, selection for, vii, viii ----, the elevation of, 293, 294 ----, the link of life, 3 ----, the most desirable, 91 ----, the rise of, 161 ----, the sanctity of, 138 Parents, selection of, 4 ----, proportion of, to population, 4 Paris, hospitals in, 247 Physique, eugenic, importance of, 69 Playing fields _versus_ gymnasia, 63 Politics, defined, 286 ----, domestics the future, 33, 285 ----, eugenics and, 118 “Politics,” Aristotle's, 167 Polygamy and infant mortality, 166 ----, significance of, 165 Population, density of, influence of the, on the death rate, 75 ----, increase of, and the food supply, 79 ----, ----, emigration a remedy for, 84 ----, ----, safe extent of, 93 ----, ----, statistics of, 75, 76 ----, quantity _versus_ quality of, 93 ----, starvation a controller of, 84 ----, statistics of, as data for prophecy, 93 ----, survival-value of, 90, 91 ----, the test of, 95 “Population and Progress,” by Montague Crackanthorpe, 315 “Population, The Principles of,” by T. R. Malthus, 83, 85, 312 “Possible Improvement of the Human Breed, etc.,” by F. Galton, 314 Posterity, our duty to, 10 “Poverty and Hereditary Genius,” by Constable, 308 Prevention of Crimes Act, The, 179 (_note_) “Prevention of Tuberculosis, The,” by Dr. A. Newsholme, 319 “Principles of Biology, The,” by Herbert Spencer, 86, 312 “Principles of Heredity, The,” by G. Archdall Reid, 311