1. The _animal_ form, or that of real aggression. It is primitive and general. In animals it is seen in a pure state, because there are no antagonistic, alterative, or restraining tendencies. Those which live by prey, the voracious carnivora, present the complete type. Besides the physiological phenomena already described there is the actual attack, each species using its natural weapons—teeth, claws, poisonous liquids. The feeling has the violence of a hurricane, of an unchained force of nature. This is because it is connected with extremely powerful instincts; that of nutrition, which requires its prey, the struggle for life under its most implacable form, that of attack—the necessity of destroying or being destroyed. At this stage the element of pleasure is _nil_, or very slight, because the destruction has a blind and unconscious character. Bain thinks that monkeys are almost capable of enjoying the agonies of their victims, and perhaps elephants also. If this is correct, the fact is only met with in the case of the higher animals. It is needless to add that this animal form of anger is seen not merely in savage, but also in civilised man. 2. The emotional form properly so called, or that of simulated aggression. Much less general than the preceding, this is peculiarly human. Through the preponderance of the psychic element, or at least, the relative effacement of the destructive impulses, it appears to me the typical stage of anger as an emotion. It is frequently seen in the higher animals; the dog, meeting his enemy, stops, growls, erects his hair, and offers all the symptoms of aggression in the nascent stage. Man most usually confines himself to threats, with some degree of violence, unaccompanied by destructiveness. The affinity of this form with the first is evident, and evolutionists have drawn from it a psychological argument in favour of descent from animals; those beings nearest to nature—_i.e._, the lowest in evolution—are continually exercising their anger: children on animals and weak people; savages, coarse-natured people, idiots and imbeciles on any one who does not resist them. But the important point to note at this stage of evolution is the definite appearance of a new element—the pleasure of seeing suffering. With this, anger begins to grow refined. “There seems little doubt,” says Bain, “that the primary fact in the pleasure of anger is the _fascination for the sight of bodily affliction and suffering_. Singular and horrible as the fact may appear, the evidence is incontestable” (_The Emotions_, p. 178). The author goes on to give instances which need not be repeated.