WOODFORD, CHARLES MORRIS, _A Naturalist among the Head-Hunters_. New York, 1890. WOODS, ERVILLE BARTLETT, _Progress as a Sociological Concept_. Chicago, 1907. WORCESTER, DEAN C., _The Philippine Islands and their People_. New York, 1898. WRIGHT, HAMILTON M., _A Hand-Book of the Philippines_. Chicago. WULFFEN, ERICH, _Das Kind_. Berlin, 1913. WYATT, EDITH, and CLARK, S. A., _Making Both Ends Meet_. New York, 1911. YOUNG, LUCIEN, _The Real Hawaii: Its History and Present Condition_. New York, 1899. FOOTNOTES: [1] Alex. Bain, _The Emotions and the Will_. [2] George Trumbull Ladd, _Philosophy of Conduct_. [3] Bergson, _Creative Evolution_, p. 119. [4] William Wundt, _Human and Animal Psychology_, p. 143. [5] Darwin, _Descent of Man_, p. 120. [6] Chas. Ellwood, _Sociology and Modern Social Problems_, p. 39. [7] Ellen Key, _The Renaissance of Motherhood_, p. 27: “Because of her motherhood, woman’s sexual nature gradually became purer than man’s. The child became more and more the centre of her thoughts and her deeds. Thus the strength of her erotic instincts diminished. The tenderness awakened in her by her children also benefited the father. Out of this tenderness—as also out of the admiration for the manly qualities which the father developed in the defence of herself and her children—gradually arose the erotic feeling directed to this man alone. Thus love began.” [8] Kidd, _Social Evolution_, p. 138. [9] Lewes, _History of Philosophy_, vol. i., p. 338. [10] Ælian: the second book, chapter vii. “This is a Theban law most just and humane: that no Theban might expose his child or leave it in a wilderness, upon pain of death. But if the father were extremely poor, whether it were male or female, the law requires that as soon as it is born it be brought in the swaddling clouts to the magistrate, who, receiving it, delivers it to some other for some small reward, conditioning with him that he shall bring up the child, and when it is grown up take it into his service, man or maid, and have the benefit of its labour in requital for its education.” [11] Mrs. John Martin. [12] Heaut., I., i., 23: Homo sum; humani nihil a me alienum puto. [13] See Appendix A. [14] A. H. Keane, _Man Past and Present_, p. 9. [15] Sir John Evans, Inaugural Address, British Association Meeting, Toronto, 1897. [16] A. Featherman, _Social History of the Races of Mankind_, vol. ii., p. 22. [17] “Man is affected by these four physical agents: climate, food, soil, and the general aspect of Nature.”—Buckle, _History of Civilization_, vol. i., p. 29. [18] _Current Anthropological Literature_, vol. ii., No. 1, p. 11. [19] Featherman, vol. ii., preface. [20] _British Central Africa_, p. 472. [21] G. Stanley Hall, _The Relations between the Lower and the Higher Races_. [22] J. Deneker, _The Races of Man_, p. 239. [23] Westermarck, _History of Human Marriage_, p. 9.