The duty of hospitality, to which a high place is assigned in the code of primitive peoples, shows morality taking a step, the first step, beyond the narrow circle of the original group of kinsmen. As we have seen, in the beginning the feeling of duty and obligation is restricted to the little group of fellow clansmen or tribesmen. Every one outside this social circle is an enemy, and is without rights. But necessity forces men to go beyond the limits of their own clan or tribe, and in time there grows up a rule that the defenseless stranger shall be kindly received, entertained for a certain period, and then allowed to depart unharmed. It is easy to see how among clans scattered thinly over a wide territory, and where the earlier isolation is beginning to be broken by trade relations, this duty of hospitality should come to be regarded as a very sacred one, and the person of the stranger guest as inviolable.[55] Thus in the development of the guest right we see morality broadening, the circle of moral obligation enlarged, and the stranger, ordinarily counted as an enemy and as rightless, brought for a moment within the sacred pale of ethical sentiment and duty.[56] A new ground of moral obligation other than that of kinship has been established. Morality is now something more than clan morality. We witness the rise of intertribal morality. The first step in the moral unification of the human race has been taken. [Sidenote: Beginnings of the ethics of war] Even in the domain of war we discover traces of the awakening of an intertribal conscience in races that are still in what we may regard as the kinship stage of culture. Speaking broadly, primitive man, whose chief occupations are hunting and fighting,[57] makes no distinction between war and the hunt. All persons not belonging to his own group are regarded by him just as he regards wild game. In his efforts to kill or capture them, all means are right. Once in his power, he may do with them as he likes; he may make slaves of them, he may torture them, or he may eat their flesh as he would that of animals taken in the chase. Conscience lays upon him not the least restraint. Only slowly do the moral feelings make conquests in this province. One of the earliest mitigations of the barbarities of primitive warfare is probably to be found in the discontinuance of the practice of eating the bodies of the slain.[58] It is this practice of cannibalism as a concomitant of war by peoples in the earlier stages of their development that perhaps more than any other circumstance gives such a repellent aspect to human life on the lower levels of culture. But as Montaigne observes, the wrong consists in killing men, not in eating them after they are dead[59]--a very just observation, and one which should awaken reflection in us who, while piously abstaining from eating our enemies, still persist in killing them.