The myths which we have already described give the only possible explanation of this belief. We have seen that the souls of new-born children are either emanations of the ancestral souls, or these souls themselves reincarnated. But in order that they may either reincarnate themselves, or periodically give off new emanations, they must have survived their first holders. So it seems as though they admitted the survival of the dead in order to explain the birth of the living. The primitive does not have the idea of an all-powerful god who creates souls out of nothing. It seems to him that souls cannot be made except out of souls. So those who are born can only be new forms of those who have been; consequently, it is necessary that these latter continue to exist in order that others may be born. In fine, the belief in the immortality of the soul is the only way in which men were able to explain a fact which could not fail to attract their attention; this fact is the perpetuity of the life of the group. Individuals die, but the clan survives. So the forces which give it life must have the same perpetuity. Now these forces are the souls which animate individual bodies; for it is in them and through them that the group is realized. For this reason, it is necessary that they endure. It is even necessary that in enduring, they remain always the same; for, as the clan always keeps its characteristic appearance, the spiritual substance out of which it is made must be thought of as qualitatively invariable. Since it is always the same clan with the same totemic principle, it is necessary that the souls be the same, for souls are only the totemic principle broken up and particularized. Thus there is something like a germinative plasm, of a mystic order, which is transmitted from generation to generation and which makes, or at least is believed to make, the spiritual unity of the clan through all time. And this belief, in spite of its symbolic character, is not without a certain objective truth. For though the group may not be immortal in the absolute sense of the word, still it is true that it endures longer than the individuals and that it is born and incarnated afresh in each new generation.