The Yahgan attitude toward death is the same as that of many primitive races. Any reference to death is strongly tabooed amongst them and to transgress this taboo, exposes the individual to grave danger and severe punishment, even the punishment of the thing tabooed. Thus the person who transgresses this taboo becomes himself taboo by arousing the anger or resentment of other members of the tribe. However, a certain ambivalent tendency seems to be present, for while the word death and the mention of the dead is prohibited, yet they feel deep grief and sorrow for dead relatives. Transgression of the taboo may arouse the other aspect of the ambivalent attitude, (for instance anger instead of sorrow) and it thus becomes a source of danger to the guilty individual and so by contagion and imitation to the community. This ambivalent tendency which leads to taboos is prominent among primitive races as well as in civilized children for instance, in the latter, the taboo of pronouncing certain words which leads to stammering or the taboo of objects possessing a sexual significance in producing kleptomania. As civilization and cultural advancement increase or as the child becomes the adult, the taboo tendency gradually declines, yet under certain conditions it may manifest itself as a psychoneurotic symptom. Since these particular primitive races have no conception of immortality, this taboo cannot be a religious or a moral obligation or prohibition, but a social phenomenon for the benefit of the tribe or for the physical welfare of the individuals comprising the tribe. Freud also has pointed out how the avoidence of the names of the dead because of fear of offence to the living is found among certain South American tribes. A third factor of importance is a study of their myths. These are the savage's day dreams. The relation between myths and dreams is well known, both having their roots in the unconscious thinking of the race. In the individual this unconscious mental process produces dreams, in the race and society, myths. Only one instance will be cited, the legend of the Yahgan Indians concerning the creation of the first man and woman. When one of the tribe was asked how the first human being came into the world, he replied that a long time ago the first man came down from the sky on a rope and later, the woman followed. Here is a striking instance of how an adult Indian had applied his knowledge of individual births literally to a cosmic process, a genuine creation myth as a form of symbolic thinking. There seems little doubt in this case, that the sky, which to all savages appears like a bowl, represented the uterus and the rope, the umbilical cord. The resemblance of this myth to certain birth and parturition dreams, as encountered in the psychoanalytic investigations of civilized adults, is certainly striking.