Kropotkin in concluding his consideration of animals, immensely strengthens his position by pointing out various methods by which new species may develop or old ones disappear, without the operation of a deadly competition between individuals. “The squirrels, for instance, when there is a scarcity of cones in the larch forests, remove to the fir-tree forests, and this change of food has certain well known physiological effects on squirrels. If this change of habits does not last—if next year the cones are again plentiful in the dark larch wood—no new variety of squirrels will evidently arise from this cause. But if part of the wide area occupied by the squirrels begins to have its physical characters altered—in consequence of, let us say, a milder climate or desiccation, (drying up) which both bring about an increase of the pine forests in proportion to the larch woods—and if some other conditions occur to induce squirrels to dwell on the outskirts of the desiccating region—we shall then have a new, i. e., an incipient new species of squirrels. A larger proportion of squirrels of the new, better-adapted variety would survive each year, and the intermediate links would die in the course of time, without having been starved out by Malthusian competitors.”

Again: “If we take the horses and cattle which are grazing all the winter through in the Steppes of Transbaikalia, we find them very lean and exhausted at the end of the winter. But they grow exhausted not because there is not enough food for all of them—the grass buried under a thin sheet of snow is everywhere in abundance—but because of the difficulty of getting it from beneath the snow and this difficulty is the same for all horses alike. * * * We can safely say that their number are not kept down by competition; that at no time of the year they need struggle, for food and that if they never reach anything, approaching over-population, the cause is in the climate, and not in competition.”

After citing the rodents that combine to store food for the winter, or fall asleep about the time competition should set in; and the buffaloes which form immense herds to migrate across a continent to where food is plentiful; and beavers, which when they grow numerous, divide into two parties, and go, the old ones down the river, and the young ones up the river and avoid competition; after citing these and many others, he declares the mandate of nature to be: “Don’t compete!—competition is always injurious to the species, and you have plenty of resources to avoid it! * * * Therefore combine—practice mutual aid! That is the surest means for giving to each and to all the greatest safety, the best guarantee of existence and progress, bodily, intellectually, and morally.”

The third chapter deals with “Mutual Aid Among Savages.” Here we meet the question as to whether the family is an ancient institution, antedating the tribe and clan or whether it appeared at a much later date as an outgrowth of the clan. Kropotkin takes the latter view as advocated by Morgan, Bachofen, Maine, Lubbock and Tylor, and rejects the former as presented by Starcke and Westermarck.

The savage of anthropological research is shown to be a very different creature from the blood-thirsty monster of popular tradition. “Sometimes he is a cannibal, it is true, but not often, and then it is closely associated with economic necessity, and is abandoned when food becomes plentiful.” The custom of leaving old men in the woods to die, is bad enough, but not so bad as supposed. They usually carry the old man with them in their migrations until he himself grows tired of being a burden and begs to be killed. When this point is reached, he is given more than his share of food, and left in the woods to die, because no one has the heart to kill him. Infanticide is practiced from the same motive which induces savages to take all kinds of measures for diminishing the birth-rate—they cannot rear all of their children. In times of plenty it disappears. It was when these customs were enveloped in a religious halo and preserved as sacred ceremonies, after all necessity for them had disappeared, that they attained their most revolting characters.

He believed in revenge but it was to be strictly measured by the offense. It must be an eye for an eye and a tooth for a tooth; not a head for an eye, or an eye for a tooth. He only killed his enemies, and he always, at all costs, defended the members of his own tribe. “Within the tribe everything is shared in common; every morsel of food is divided among all present; and if the savage is alone in the woods, he does not begin his meal until he has loudly shouted thrice an invitation to any one who may hear his voice to share his meal.”... “If he infringes one of the smaller tribal rules, he is prosecuted by the mockeries of the women.” “When he enters his neighbors’ territory he must loudly announce his coming, and if he enters a house he must deposit his hatchet at the entrance. If one shows greediness when spoil is divided all the others give him their share to shame him.” Scolding and scorning are greatly condemned. Their children are not very quarrelsome and very rarely fight. The most they may say, is, “Your mother does not know sewing,” or “Your father is blind of one eye.”

The savage identified his interests with those of his tribe; he was no individualist, and under no circumstances would he have consented to child labor.

When we reach the barbarians, who are considered in the fourth chapter, we enter the historical period. At first sight, mutual aid seems to be non-existent at this period. Here there seems to be nothing but battle and bloodshed. But the reason is not far to seek; it is because, until recently historians regaled us exclusively with what has been aptly called, “drum and trumpet history.” “They hand down to posterity the most minute descriptions of every war, every battle and skirmish, every contest and act of violence, every kind of individual suffering; but they hardly give any trace of the countless acts of mutual support and devotion which every one of us knows from his own experience * * * The annalists of old never failed to chronicle the petty wars and calamities which harrassed their contemporaries but they paid no attention whatever to the life of the masses, although the masses chiefly used to toil peacefully while the few indulged in fighting.”

But Sir Henry Maine in his work on the “Origin of International Law,” has fully proved that “Man has never been so ferocious or so stupid as to submit to such an evil as war without some kind of an effort to prevent it.” And he has shown how exceedingly great is “the number of ancient institutions which bear the marks of a design to stand in the way of war, or to provide an alternative to it.”

A pregnant suggestion is offered as to the causes of that great migration of barbarians which resulted in the overthrow of the Roman empire. “It is desiccation, a quite recent desiccation continued still at a speed which we formerly were not prepared to admit. Against it man was powerless. When the inhabitants of North-West Mongolia and East Turkestan saw that water was abandoning them they had no course open to them but to move down the broad valleys leading to the lowlands, and to thrust westward the inhabitants of the plains.” And so the one great war recorded of the barbarians, was thrust upon them by absolute physical necessity.