(1) Brief reference is made to some of the earliest writings on the subject of anger, and comparison is made with more recent views.

(2) Anger, as traced throughout the scale of evolution of the animal kingdom, has served as a stimulus to aggression for the procuring of food, as an aid to survival, and as a necessity for the acquirement and maintenance of supremacy.

(3) Anger, occurring in mankind is (phylogenetically) an expression of an atavistic reversion or retrogression, and (ontogenetically) also an indication of familial or individual devolution.

(4) Anger, clinically considered, ranges in varying degrees of severity, from mere temporary defective inhibition to conditions of suicidal and homicidal impulse of medico-legal and even national importance, as individuals, families or communities, become affected.

(5) Reference is made to some of the causes, symptoms, and methods of treatment of anger as coming within the experience of the medico-psychologist.