Primitive men did not philosophize; but, for all that, they had their own way, an instinctive, non-conceptual way, of believing in the soul's immortality. It was a belief rooted in an obscure experience of the self, and in the natural aspirations of the spirit in us to overcome death. We need not embark on an analysis of this natural and instinctive, non-philosophical belief in immortality. I should like merely to quote a passage from a book by the late scientist Pierre Lecomte du Noüy. Speaking of prehistoric man, he said: "Not only did the Neanderthal Man, who lived in Paleolithic times, bury his dead, but sometimes he buried them in a common ground. An example of this is the Grotte des Enfants near Mentone. Because of this respect he had for his dead, we have reached an anatomical knowledge of the Neanderthal Man that is more perfect than that which we have of certain races which have recently become extinct, or which still exist, such as the Tasmanians. This is no longer a question of instinct. We are dealing already with the dawn of human thought, which reveals itself in a kind of revolt against death. And revolt against death implies love for those who have gone as well as the hope that their disappearance is not final. We see these ideas, the first perhaps, develop progressively alongside the first artistic feelings. Flat rocks in the shape of dolmens are placed so as to protect the faces and heads of those who are buried. Later, ornaments, weapons, food, and the colors which serve to adorn the body, are placed in the tombs. The idea of finality is unbearable. The dead man will awaken, he will be hungry, he will have to defend himself, he will want to adorn himself."