I see no objection to the assumption that it is just this incestuous factor of the relationship which motivates the avoidance between son-and mother-in-law among savages. Among the explanations for the ‘avoidances’ which these primitive races observe so strictly, we would therefore give preference to the opinion originally expressed by Fison, who sees nothing in these regulations but a protection against possible incest. This would also hold good for all the other avoidances between those related by blood or by marriage. There is only one difference, namely, in the first case the incest is direct, so that the purpose of the prevention might be conscious; in the other case, which includes the mother-in-law relation, the incest would be a phantasy temptation brought about by unconscious intermediary links. We have had little opportunity in this exposition to show that the facts of folk-psychology can be seen in a new light through the application of the psychoanalytic point of view, for the incest dread of savages has long been known as such, and is in need of no further interpretation. What we can add to the further appreciation of incest dread is the statement that it is a subtle infantile trait and is in striking agreement with the psychic life of the neurotic. Psychoanalysis has taught us that the first object selection of the boy is of an incestuous nature and that it is directed to the forbidden objects, the mother and the sister; pyschoanalysis has taught us also the methods through which the maturing individual frees himself from these incestuous attractions. The neurotic, however, regularly presents to us a piece of psychic infantilism; he has either not been able to free himself from the childlike conditions of psychosexuality, or else he has returned to them (inhibited development and regression). Hence the incestuous fixations of the libido still play or again are playing the main rôle in his unconscious psychic life. We have gone so far as to declare that the relation to the parents instigated by incestuous longings is the central complex of the neurosis. This discovery of the significance of incest for the neurosis naturally meets with the most general incredulity on the part of the grown-up, normal man; a similar rejection will also meet the researches of Otto Rank, which show in even larger scope to what extent the incest theme stands in the centre of poetical interest and how it forms the material of poetry in countless variations and distortions. We are forced to believe that such a rejection is above all the product of man’s deep aversion to his former incest wishes which have since succumbed to repression. It is therefore of importance to us to be able to show that man’s incest wishes, which later are destined to become unconscious, are still felt to be dangerous by savage races who consider them worthy of the most severe defensive measures. CHAPTER II TABOO AND THE AMBIVALENCE OF EMOTIONS 1