man is phylogenetically a nonpredatory animal, and hence this aggression, as far as its neurophysiological roots are concerned, is not of the predatory type. It should be remembered that human dentition “is poorly adapted for the flesh-eating habits of man, who still retains the tooth form of his fruit- and vegetable-eating ancestors. It is interesting to note, too, that man’s digestive system has all the physiological hallmarks of a vegetarian, not a carnivore.