Age of members--Their habitat, nationality, and social class-- Permanence of and definiteness of organization of gangs-- Their names--Times and places of meeting--Officers-- Initiation ceremonies--Rules--Resignations and expulsions-- Method of settling disputes--Emergence of the group mind. IV. CERTAIN ACTIVITIES OF THE GANG 39 Analysis of gang activities--Survivals from pre-gang stage-- Group games--Tribal industries--Boys’ reports of these-- Their significance--“Plaguing people”--Boys’ reports-- Instinctive nature of the impulse--Stealing--Reports. V. FURTHER ACTIVITIES OF THE GANG 50 Migration--Reports--Truancy--Reports--Theatre-going-- Reports--Fighting--Personal fights--Fights between groups inside the gang--Fights between gangs--A case of war between federations of gangs. VI. THE ANTHROPOLOGY AND PSYCHOLOGY OF THE GANG 72 Certain human instincts--Differing instincts of boys and girls--Many instincts of boyhood are survivals from savagery-- The Recapitulation Theory, therefore, the key to boy psychology--Not, however, a complete explanation--Certain qualities of the young look toward the future--Illustrations of these--Ancestral qualities persist when useful--Examples from instincts of both boys and girls. VII. THE CONTROL OF THE MORE PRIMITIVE IMPULSES 83 Certain maladjustments of human instincts to civilized life-- These especially noteworthy in boyhood--Instinctive basis of cruelty in boys--Other causes of cruelty--Psychology of “plaguing people”--Pedagogic worthlessness of the impulse--Its cure--Impulse to plague girls of a different nature--Apparently protective--The love of fighting--Its instinctive nature--Fighting is, on the whole, a virtue-- Its pedagogic value--Practical treatment of the problem-- Two working rules--Self-limiting nature of the evil. VIII. THE MANAGEMENT OF THE PREDATORY IMPULSES 94 Transitory nature of instincts--Acquisitiveness the basis of boys’ thieving--Self-limiting quality of stealing--Effect of collections--Of common property--Cure of thievery must regard origin--Practical hints--Effect of gardens and shops--Unconscious element in anti-social impulses-- Unfortunate position of city boy--Analysis of reasons for theft--Removal of specific causes--Summary of two chapters on anti-social gang activities and their cure. IX. THE TRIBAL INSTINCTS AND THE WANDERLUST 109