(3) Troops or herds, comprising several families. This type is common amongst monkeys: generally the families are monogamous, and both parents care for the offspring; they have leaders, and combine in mutual defence. This is especially effective with the baboons—who, however, are polygamous. A very similar type is characteristic of cattle; who also have leaders as the result of battle between the bulls, each trying to control and keep together as many cows as he can; and they often combine their forces against beasts of prey. (4) Hunting-packs—most noticeable with wolves and wild dogs: they have leaders, and probably an order of precedence determined by battle. In the breeding-season (February to August) a pack of wolves breaks up into pairs; but whether their pairing is for life or merely seasonal is disputed; and it is also doubtful whether the male takes any share in caring for the puppies; such habits may vary in different localities.[32] The numbers of the pack depend on circumstances, and are now much smaller in Canada than in Russia. Was our own primitive society, then, like any of these? Since direct evidence cannot be obtained, we must be guided in forming our hypothesis by two considerations: (_a_) what type of society gives the best explanation of human nature as we now find it? and (_b_) for which type can we give the best reason why it should have been adopted? So I point out (_a_) that man, in character, is more like a wolf or dog than he is like any other animal; and (_b_) that for the forming of a pack there was a clear ground in the advantage to be obtained by co-operative hunting.[33] It must be admitted that Darwin, discussing sexual selection in man, suggests a different hypothesis. He says: “Looking far enough back in the stream of time, and judging from the social habits of man as he now exists, the most probable view is that he aboriginally lived in small communities, each with a single wife, or if powerful with several, whom he jealously guarded against all other men. Or he may not have been a social animal, and yet have lived with several wives, like the gorilla; for all the natives ‘agree that but one adult male is seen in a band; when the young male grows up, a contest takes place for mastery, and the strongest, by killing and driving out the others, establishes himself as the head of the community.’ The younger males, being thus expelled and wandering about, would, when at last successful in finding a partner, prevent too close inter-breeding within the limits of the same family.”[34] The information concerning the polygamy of the gorilla, quoted here from Dr. Savage, who wrote in 1845, has not since (I believe) been confirmed, except by Prof. Garner.[35]