Instinctive aversion among animals to pairing with individuals belonging to another species, pp. [278]-280.—Infertility of first crosses and of hybrids, pp. 279, et seq.—‘The Law of Similarity,’ p. [280].—Bestiality, pp. [280], et seq.—The various human races said to have an instinctive aversion to intermingling, pp. [281], et seq.—Intermixture of races, pp. [282], et seq.—Its effects on fertility, pp. [283]-288.—Rejection of M. Broca’s theory as to the infertility of the connections of Europeans with Australian women, pp. [284]-287.—The doctrine of the unity of mankind independent of the degree of fertility of first crosses, and of mongrels, pp. [288], et seq.
PROHIBITION OF MARRIAGE BETWEEN KINDRED
The horror of incest almost universally characteristic of mankind, p. [290].—Intercourse between parents and children, pp. [290], et seq.—Between brother and sister, pp. [291]-294.—Between half-brother and half-sister, pp. [294], et seq.—Between uncle and niece, and aunt and nephew, pp. [295], et seq.—Between first cousins, pp. [296], et seq.—The prohibited degrees among peoples unaffected by modern civilization more numerous, as a rule, than in advanced communities, pp. [297]-309.—Prohibition of marriage between relatives by alliance, pp. [309], et seq.—Early hypotheses as to the origin of the prohibitions of marriage between near kin, p. [310].—Criticism of Mr. McLennan’s hypothesis as to the origin of exogamy, pp. [311]-314.—Criticism of Mr. Spencer’s views, pp. [314], et seq.—Of Sir John Lubbock’s, p. [316].—Of Professor Kohler’s, pp. [316], et seq.—Of Mr. Morgan’s, &c., pp. [318], et seq.—The prohibition of incest founded not on experience, but on instinct, p. [319].
PROHIBITION OF MARRIAGE BETWEEN KINDRED
(Concluded)
No innate aversion to marriage with near relations, p. [320].—Innate aversion to sexual intercourse between persons living very closely together from early youth, pp. [320]-330.—Local exogamy, pp. [321]-323.—Connection between the prohibited degrees and the more or less close living together, pp. [324]-329.—Connection between the ‘classificatory system of relationship’ and exogamy, p. [329].—The one-sidedness of prohibitions due in part directly to local relationships, in part to the influence of names, pp. [330], et seq.—The prohibitions of marriage between relations by alliance and by adoption due to an association of ideas, p. [331].—The prohibitions on the ground of ‘spiritual relationship’ due to the same cause, ibid.—Endogamy seldom occurs in very small communities, p. [332].—Marriage between half-brothers and half-sisters not contrary to the principle here laid down, ibid.—Incestuous unions due to pride of birth, to necessity, to extreme isolation, and to vitiated instincts, p. [333].—Incest among the lower animals, p. [334].—The effects of cross- and self-fertilization among plants, p. [335].—Evil effects of close interbreeding among animals, pp. [335]-337.—A certain amount of differentiation favourable for the fertilisation or union of two organisms, pp. 337, et seq.—Difficulty of adducing direct evidence for the evil effects of consanguineous marriages among men, pp. [338], et seq.—Close intermarrying among the Veddahs, pp. [339], et seq.—The effects of marriage between first cousins, pp. [340]-343.—The experience of isolated communities does not prove consanguineous marriages to be harmless, pp. [343]-345.—The bad consequences of self-fertilization and close interbreeding may almost fail to appear under favourable conditions of life, pp. [345], et seq.—Consanguineous marriages more injurious in savage regions than in civilized society, p. [346].—Tendency of endogamous peoples to die out, pp. [346]-350.—Peoples who ascribe evil results to close intermarriage, pp. [350]-352.—The horror of incest due to natural selection, pp. [352], et seq.—Exogamy arose when single families united in small hordes, p. [353].—Love excited by contrasts, pp. [353]-355.
SEXUAL SELECTION AS INFLUENCED BY AFFECTION AND SYMPATHY, AND BY CALCULATION
The compound character of love, p. [356].—Conjugal affection, at the lower stages of civilization, less intense than parental love, pp. [356]-358.—Conjugal affection among savages, pp. [358], et seq.—Among primitive men, pp. [359], et seq.—Mutual love as the motive which leads to marriage, pp. [360], et seq.—Sexual love has developed in proportion as altruism has increased, ibid.—Sexual love among the Eastern nations, ibid.—Sexual selection determined by intellectual, emotional, and moral qualities, p. [362].—Sexual selection influenced by sympathy, pp. [362]-376.—By age, p. [362].—By the degree of cultivation, pp. 362, et seq.—Racial and national endogamy, pp. [363]-365.—Tribal- communal- and clan-endogamy, pp. [365]-368.—The origin of castes and classes, pp. [368], et seq.—Want of sympathy between different classes, pp. [369], et seq.—Class- and caste-endogamy, pp. [370]-373.—The decline of national- and class-endogamy in modern society, pp. [373], et seq.—Religion a bar to intermarriage, pp. [374]-376.—The increase of mixed marriages, p. [376].—Desire for offspring, pp. 376-378.—Appreciation of female fecundity, p. [378].—Sexual selection influenced by the desire for offspring, pp. [378], et seq.—The causes of this desire, pp. [379], et seq.—With the progress of civilization this desire has become less intense, p. [381].—A wife chosen because of her ability as a labourer, pp. [381], et seq.—A husband chosen because of his ability to protect and provide for a wife and offspring, p. [382].—Wife-purchase and husband-purchase in modern society, ibid.