INDEX 



347 



Language developed only in 

 man, 67, 328 



development of, 64 



inheritance of, 38 



of animals, 44 



of children, 44, 47 



of savages, 55 



origin of, 58 



primitive, 48 



the foundation of society, 44 



the result of growth, 50 

 Latin races, 213 

 Laws, 87 



origin of, 86 



controlling evolution, 8 

 Length of life, 33 

 Lincoln, 19, 314 

 Louis XII, 89 



Mammals, societies among, 146 



Man, accomplishments of, 203 



Martyr, 94 



Mathematical genius, 320 



Maxim, 318 



Mental evolution, 3 

 and language, 66, 71 

 vs. physical evolution, 202 



Microorganisms, 227, 242 



Migrations of the Aryans, 234 



Mob action, 218, 221 



Modern nations, formation of, 

 173 



Mohammedanism, 274 



Monkeys, 58, 97, 180 



Moral codes, inheritance of, 

 292 

 evolution of, 82 



Moral nature, innate or ac- 

 quired, 72, 73, 296 



Moral sense, 4, 5, 22. 94, 248 

 among savages, 95, 99 

 and moral codes, 113 

 and social heredity, 121 

 development of, 106 

 inheritance of, 41 

 innate or acquired, 73, 95, 122 

 in primitive family, 96 

 nature of, 94 

 new with man, 73 

 organic or acquired, 294 

 origin of, 95, 118 

 origin of in a child, 104 

 the foundation of social 

 evolution, 267 



Morals and laws, 86 

 Mother's love, 79 

 Motives in low races, 97, 100 

 Muller's "roots," 52 

 Mutations, 119, 313 



Napoleon, 193, 314 



Natural forces, explain natural 

 phenomena, 6 



Natural selection, affecting 

 peaceful nations, 238 

 among higher classes, 243 

 among lower classes, 240 

 and the human race, 223, 334 

 develops ethical nations, 334 

 leads to disintegration, 264 

 not necessary for human 



progress, 308 

 reversal of, 250 



Nature vs. nurture, 11, 304, 337 



Nurture, 304 



Obligations, 83, 91, 100 



broadening of, 91 



to one's enemies, 93 

 Opportunity vs. license, 199 

 Organic and social heredity, 



summary, 300 

 Organic heredity, 26, 37 



in man, 35, 292 



its uncertainty, 37 

 Organization, 206, 233 



and individuals, 153 



foundation of, 207 



growth of, 150, 178 



significance of, 126 

 Other self, 105, 112 



Panmixia, 251 



Passions, 243 



Patriarchal nations, 159 



Patriarchal system, 156 

 based on the family, 156 

 religious authority of the 



king, 157 

 weakness of, 160, 161 



Patriotism, 182, 276 



Perceptions, 4 



Permanency of inherited traits, 

 11 



Persian empire, 160, 213 



Philology, evidence from, 49 



Political parties, 194 



Primitive family, conditiott 

 of, 137, 140 



