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._ CHAPTER XVII MARRIAGE BY CAPTURE AND MARRIAGE BY PURCHASE Marriage by capture as a reality or as a symbol among uncivilized races, pp. 383-386.—Among peoples of the Aryan race, pp. 386, _et seq._—No evidence that marriage by capture has prevailed among every race, p. 387.—Marriage _with_ capture, p. 388.—Marriage by capture and exogamy, pp. 388, _et seq._—The origin of marriage by capture, p. 389.—Marriage by capture once the normal, never the exclusive form of contracting marriage, _ibid._—Marriage by exchange, p. 390.—Wives obtained by service, pp. 390-392.—Wives obtained by actual purchase, pp. 392-394.—Marriage on credit, p. 394.—Marriage by purchase among civilized races, pp. 394-397.—Lower peoples among whom marriage by purchase does not exist, pp. 397-399.—Marriage by purchase a more recent stage than marriage by capture, pp. 399-401.—Barter a comparatively late invention of man, pp. 400, _et seq._—Transition from marriage by capture to marriage by purchase, p. 401.—The bride-price a compensation for the loss sustained in giving up the girl, p. 402.—Bargain about women, _ibid._—Savage views on marriage by purchase, _ibid._ CHAPTER XVIII THE DECAY OF MARRIAGE BY PURCHASE. THE MARRIAGE PORTION