The altruistic sentiments of mankind will be treated at {113} length in subsequent chapters. We shall find reason to believe that not only maternal, but to some extent, paternal and conjugal affection, prevailed in the human race from ancient times, and that social affection arose in those days when the conditions of life became favourable to an expansion of the early family, when the chief obstacle to a gregarious life--scarcity of food--was overcome, and sociality, being an advantage to man, became his habit. There are still savages who live in families rather than in tribes, but we know of no people among whom social organisation outside the family is totally wanting. Later discoveries only tend to confirm Darwin's statement that, though single families or only two or three together, roam the solitudes of some savage lands, they always hold friendly relations with other families inhabiting the same district; such families occasionally meeting in council and uniting for their common defence.[11] But as a general rule, to which there are few exceptions, the lower races live in communities larger than family groups, and all the members of the community are united with one another by common interests and common feelings. Of the harmony, mutual good-will, and sense of solidarity, which under normal conditions prevail in these societies, much evidence will be adduced in following pages. Mr. Melville's remark with reference to some Marquesas cannibals may be quoted as to some extent typical. "With them," he says, "there hardly appeared to be any difference of opinion upon any subject whatever. . . . They showed this spirit of unanimity in every action of life: everything was done in concert and good fellowship."[12] When a member of the group is hurt, the feeling of unanimity takes the form of public resentment. As Robertson observed long ago, "in small communities, every man is touched with the injury or affront offered to the body of which he is a member, as if it were a personal attack upon his own honour or safety. The desire of revenge is communicated from breast to breast, {114} and soon kindles into rage."[13] Speaking of some Australian savages, Mr. Fison remarks:--"To the savage, the whole gens is the individual, and he is full of regard for it. Strike the gens anywhere, and every member of it considers himself struck, and the whole body corporate rises up in arms against the striker."[14] Nobody will deny that there is a disinterested element in this public resentment, even though every member of the group consider the enemy of any other member to be actually his own enemy as well, and, partly, hate him as such. [Footnote 11: Darwin, _op. cit._ p. 108.] [Footnote 12: Melville, _Typee_, p. 297 _sq._]