It will be probably a shock to many people to be told that the cannibalistic instinct still is part of our unconscious. It appears in that pathological state known as lycanthropy where the patient often has a craving for human flesh. It is occasionally revived in cases of starvation and shipwreck, when men are driven to eat human flesh. There should be nothing strange about this, for we are descended from people who were cannibals. And we know that men of the old stone age in France were cannibals and it was practised in Greece in earliest times. It has not yet been exterminated in parts of Africa and Polynesia.