consider the chronic cases where war neuroses pass over into peace ones. (5) The principle of the psycho-analytical theory that has aroused the strongest opposition is that the primary repressed wish ultimately responsible for the neurosis is always of a sexual nature, so that the conflict is between the two groups of instincts that go to make up the whole personality, those concerned respectively with preservation of the self and of the species. Dr. MacCurdy has suggested to me that this is so only because, apart from war, there is no instinct that comes into such strong conflict with the ego-ideal as does the sexual one, but that in war the conflict between the instinct for self-preservation and the ego-ideal is enough to lead to a neurosis. This may seem very plausible, but I shall be surprised if it is confirmed by future research. That a neurosis, which after all is a disorder of the unconscious imagination, should arise from a conflict between two states of mind that are fully in contact with reality would be something entirely contradictory of our past experience, as would also a neurosis arising from a conflict between two tendencies both belonging to the ego. I shall venture to put forward an alternative hypothesis presently when discussing the subject of fear, which we have next to consider. Freud states[14] that from one point of view all psychoneurotic symptoms may be regarded as having been constructed in order to prevent the development of fear—another point of contact between his theory and the observers of war neuroses, who would surely agree that fear is the central problem they have to deal with. By fear is here meant rather the mental state of dread and apprehension, increasing even into terror, and accompanied by well-marked bodily manifestations, a state for which psychopathologists have agreed to use the term “morbid anxiety” (or, shortly, “anxiety”) in a special technical sense as being the nearest equivalent of the German word _Angst_.