Chapter II: A Human Pairing Season in Primitive Times

Hypotheses as to the periodicity in the sexual life of animals, p. 25.—Every month or season of the year the pairing season of one or another mammalian species, pp. 25, _et seq._—The rut not dependent upon any general physiological law, but adapted to the requirement of each species separately, pp. 26, _et seq._—Wild species without a definite pairing season, p. 27.—Rutting season among the man-like apes, _ibid._—Among our earliest human or half-human progenitors, p. 28.—Periodical increase of the sexual instinct among existing savages, pp. 28-31.—Among civilized peoples, pp. 31-33.— The increase of the sexual instinct at the end of spring or in the beginning of summer, probably a survival of an ancient pairing season, pp. 34, _et seq._—The winter maximum of conceptions, pp. 35-37.—Why man is not limited to a particular period of the year in which to court the female, pp. 37, _et seq._—Domestic animals without a definite pairing season, p. 38.

CHAPTER III

THE ANTIQUITY OF HUMAN MARRIAGE

Marriage a necessary requirement for the existence of the human race, p. 39.—The hypothesis that the maternal uncle was the guardian of the children, pp. 39-41.—The father the head of the family, p. 41.—The hypothesis that all the men of the tribe indiscriminately were their guardians, pp. 41, _et seq._—Man originally not a gregarious animal, pp. 42, _et seq._—The solitary life of the man-like apes, _ibid._—Savage peoples living in families rather than in tribes, pp. 43-47.—Insufficient food supply a hindrance to a true gregarious manner of living, pp. 47-49.—The gregariousness and sociability of man sprang in the main from progressive intellectual and material civilization, pp. 49, _et seq._