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Rh are granted him, but if not so admitted he is an enemy. We can now see why the sentiments of peace and cooperation inside are complementary to sentiments of hostility outside. It is because any group, in order to be strong against an outside enemy, must be well disciplined, harmonious, and peaceful inside; in other words, because discord inside would cause defeat in battle with another group. Therefore the same conditions which made men warlike against outsiders made them yield to the control of chiefs, submit to discipline, obey law, cultivate peace, and create institutions inside. The notion of rights grows up in the in-group from the usages established there securing peace. There was a double education, at the same time, out of the same facts and relations. It is no paradox at all to say that peace makes war and that war makes peace. There are two codes of morals and two sets of mores, one for comrades inside and the other for strangers outside, and they arise from the same interests. Against outsiders it was meritorious to kill, plunder, practice blood revenge, and to steal women and slaves; but inside none of these things could be allowed because they would produce discord and weakness. Hence, in the in-group, law (under the forms of custom and taboo) and institutions had to take the place of force. Every group was a peace-group inside and the peace was sanctioned by the ghosts of the ancestors who had handed down the customs and taboos. Against outsiders religion sanctioned and encouraged war; for the ghosts of the ancestors, or the gods, would rejoice to see their posterity and worshipers once more defeat, slay, plunder, and enslave the ancient enemy.

The Eskimos of Bering Strait think it wrong to steal from people in the same village or tribe; a thief is publicly reproached and forced to return the thing stolen. But to