National Emergence of Gangs:
Gangs emerged regionally in this order: Northeast → Midwest → West → South
Development by Region:
Northeast (NYC-centered):
1783–1860s: Early gangs like the Forty Thieves (1826) in Five Points District; Irish/Catholic/Italian youth dominated Boston gangs.
1860s–1930s: Tammany Hall supported gang growth; police began cracking down.
1930s–1980s: Gang activity spread to Harlem, Bronx, Brooklyn; rise in non-white and drug-involved gangs.
Midwest (Chicago):
1860s–1920: Gangs among white immigrant youth; emergence of Black gangs.
1920s–1940s: Growth during the Great Migration; gangs formed for protection.
1940s–1980s: CHA housing projects (e.g., Robert Taylor Homes) central to gang control over drugs, protection, prostitution.
West (L.A.):
1890s–1940s: Originated from Mexican palomilla tradition; formed in El Paso, East LA.
1940s–1950s: Sleepy Lagoon Murder, Zoot Suit Riots triggered gang growth.
1950s–1980s: Crips and Bloods emerged in public housing projects.
South:
Gangs emerged later due to:
Less European immigration
Agricultural economy pre-WWII
Great Migration reduced minority population
Religious culture
Fewer parks/public spaces
Low Mexican immigration
Gang Goals:
Territorial defense
Honor maintenance
Prestige among peers
Defensive Localism:
Gangs protect their neighborhood, provide services, uphold honor, and offer protection from prejudice.
Cycles of Violence:
Escalating retaliatory violence strengthens group identity/cohesion:
Identify threat
Mobilization
Attack
Retaliation
Repeat
Prison's Role:
Prisons facilitate gang growth by:
Providing protection for inmates
Consolidating leadership after street crackdowns
Big Gang Theory:
Gangs inflate their danger and connections for protection; most youth gangs are not highly organized.
Gang Migration Myth:
False belief gangs move across the U.S. to form satellites—most are homegrown.
Drugs-Violence Myth:
Gang involvement in drug trafficking is overstated; many do not control drug markets.
Other Myths:
Gangs are boring, loosely structured, and membership is often short-term.
Kids are not always pressured into gangs—many want to join.
Youth, not adults, recruit new members.
Gang involvement peaked before the crack epidemic.
Chicago School Influence:
Robert Park: City as a social organism.
Burgess's Concentric Zones:
Zone of Transition = highest crime/gang activity
Shaw and McKay (Cook County):
Delinquency is ecologically stable, linked to poverty and proximity to the central business district.
Thrasher's Contributions:
"Ganging" in interstitial areas
Community conditions:
Disorganization
Ineffective families
Poor schools
Bad peers
No structured leisure time
Situation Complex: All factors interrelated.
Disorganization Role of Gangs:
Gangs thrive when institutions fail
Gangs replace those institutions
Howell & Griffiths Gang Emergence Stages:
Immigration → social disorder
Family/neighborhood breakdown
Youth alienation → marginality
Gang formation
Expansion aided by public housing, prisons, drugs, guns
Multiple Marginality:
Exclusion due to race, language, economics
Expansion Factors:
Housing projects
Prisons
Drugs/guns
Differential Opportunity Theory (Cloward & Ohlin):
Blocked legitimate paths → seek illegitimate means through gangs
Subcultural Theories:
Middle-class measuring rod (Cohen): Lower-class youth create oppositional values and gangs due to status frustration.
Developmental Pathways vs. Trajectories:
Pathways: Individual behavior over time
Trajectories: Shared patterns across groups
Loeber's Three Pathways:
Authority conflict (defiance)
Covert (property crime)
Overt (violence) – most associated with gangs
Social Development Model (SDM):
4 Constructs:
Involvement opportunities
Actual involvement
Skills
Reinforcement → builds social bonds
Interactional Theory (Thornberry & Krohn):
Key idea: Risk factors in multiple domains lead to gang joining
Howell-Egley Theory:
Pushes = risk factors
Pulls = gang attractions (ranked):
Protection
Fun
Respect
Money
Friends
Risk Factors by Age:
Preschool: Aggressive temperament, impulsivity
School Entry: Conduct problems, family conflict
Later Childhood: Peer rejection, school failure
Adolescence: Drug use, delinquency, deviant peers
Community Risk Factors:
Disadvantage, delinquent youth, low attachment, drug/gun access
Family Risk Factors:
Poor supervision, abuse, instability, poverty, gang relatives
School Risk Factors:
Unsafe schools, victimization, low achievement
Peer/Individual Risks:
Delinquent friends, early drug use, mental health problems
Protective Factors:
Supervision, self-esteem, role models, education goals
Vigil's Stages of Joining:
Exposure
Acceptance
Interaction
Association
Initiation
Consequences of Gang Membership:
Victimization
Criminal records
Dropouts, teen parenthood
Poor health, depression, incarceration
Theory Summaries:
Social Control: Weak bonds = deviance
Differential Association: Learn deviance from peers
Labeling: Gang label becomes identity
Gang Initiative Process:
Identify risk factors
Assess gang presence
Provide evidence-based programs
Assessment Questions:
Who, What, When, Where, Why
Prevention Levels:
Primary: General population
Secondary: High-risk youth
Intervention: Gang members
Suppression: Most dangerous offenders
Level 4 Priority: School bonds/safety
Programs:
PeaceBuilders: Elementary, prosocial behavior
G.R.E.A.T.: Gang resistance (↓ gang joining by 24%)
Project BUILD: Youth in detention
ART: Anger control & moral reasoning
Aggressive Behavioral Control: High-intensity therapy
Gang Databases:
Used for intelligence, but risk false identification
Validation Criteria:
ONE major indicator (e.g., confession, crime for gang)
OR TWO signs (e.g., tattoos, gang signs, affiliations)
Definition:
Continuing criminal enterprise using force, threats, corruption to profit from illicit services
La Cosa Nostra (LCN):
24 families governed by The Commission
Structured like a corporation (Boss → Underboss → Capo → Soldiers → Associates)
Membership = Italian males, proven criminals
Growth Drivers:
Tammany Society
Prohibition (Volstead Act)
Al Capone:
Built empire in Chicago, earned $105M/year, jailed for tax evasion
Other Groups:
Russian Mafiya:
Skills-based, not hierarchical; #1 threat (FBI)
Japanese Yakuza:
Public affiliations, evolved from samurai
Outlaw Motorcycle Gangs:
“Big Four”: Hell’s Angels, Outlaws, Bandidos, Pagans
Drug production/distribution primary income