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Theories of Crowd Behaviour: Classical, Convergence, and Group Mind

"When individuals collect in a crowd, their individual mind becomes part of the collective mind — the collective mind thinks in its own way." — Gustave Le Bon (1895)

Introduction​

Why do ordinary, reasonable people sometimes act in extraordinary, unreasonable ways when they are part of a crowd? What psychological transformation occurs when individuals merge into a mass? These questions have fascinated social scientists since the 19th century and led to three influential theoretical traditions explaining crowd behaviour.

Each theory offers a different explanation for the same phenomenon — and understanding their differences, strengths, and limitations is crucial for MAPC students.

📄 Source PDF: Block-4/Unit-3.pdf — Pages 39–41 📚 MPC-004 Advanced Social Psychology, Block 4: Group Dynamics

Overview: Three Major Theories​

1. Classical Theory (Le Bon, 1895)​

Gustave Le Bon published "The Crowd: A Study of the Popular Mind" in 1895 — one of the most influential and controversial works in social psychology.

Core Ideas​

Le Bon's Classical Theory proposes:

  1. Anonymity breeds irrationality: When individuals join a crowd, they lose their personal identity through anonymity
  2. Collective mind formation: The individual minds of crowd members merge to form a unified crowd mind or group mind
  3. Unconscious dominates: In the crowd, unconscious motives become more active; conscious, rational motivation sinks into the background
  4. De-individualisation: The person becomes uninhibited and may show behaviour they would never exhibit alone
  5. Contagion and suggestibility: Emotions spread like a disease through the crowd; members become highly suggestible

Carl Jung's Parallel​

Le Bon's concept of the merged crowd mind parallels Carl Jung's notion of the "collective unconscious" — a shared layer of the unconscious mind common to all humans that can be activated under certain conditions.

Crowd Characteristics According to Le Bon​

CharacteristicDescription
AnonymityMembers feel unidentifiable and unaccountable
ContagionEmotional spread — feelings and behaviours are "contagious"
SuggestibilityCritical thinking impaired; easily influenced by slogans, appeals
Unconscious DominationRational thinking replaced by primitive emotional impulses
Loss of IndividualityPersonal responsibility dissolves into collective identity

Critique of Classical Theory​

  • Overly negative view: Le Bon saw crowd behaviour as inherently regressive and dangerous
  • Ignores positive crowd behaviour: Solidarity, mutual aid, collective celebration are also crowd phenomena
  • Circular reasoning: "The crowd acts irrationally because the crowd mind is irrational"
  • Historical bias: Le Bon wrote during the French Revolution aftermath, heavily influencing his pessimistic view

2. Convergence Theory​

Convergence Theory emerged in the 20th century as a direct critique of Le Bon's view.

Core Ideas​

  1. Crowd behaviour is not created by the crowd — it is brought into the crowd by particular individuals
  2. Like-minded people converge: People who already share certain beliefs, values, or intentions come together to form crowds
  3. No genuine transformation: Unlike Le Bon, convergence theorists argue there is no magical psychological change when joining a crowd
  4. Crowd expresses existing beliefs: The mob reaction is the "rational product of widespread popular feeling" — it reflects what these individuals already believed before joining

Implication​

  • The crowd itself does not generate racial hatred or violence
  • Violence occurs because people who already harboured violent intentions came together
  • Example: A racist mob is not racist because it is a mob — it is a mob because racists converged

Comparison: Classical vs. Convergence Theory​

AspectClassical TheoryConvergence Theory
Source of crowd behaviourThe crowd itself transforms individualsIndividuals bring behaviour with them
Psychological changeRadical transformation occursNo significant transformation
Crowd as causeYes — crowd creates the behaviourNo — pre-existing attitudes cause behaviour
Implication for interventionChange the crowd situationChange the individuals' attitudes before they converge

Critique of Convergence Theory​

  • Does not fully explain contagion: Sometimes neutral bystanders do get swept up in crowd behaviour
  • Overly rational: Underestimates the genuine social-psychological dynamics that emerge in crowd situations
  • Deterministic: Implies people's behaviour is entirely pre-determined by prior attitudes

3. Group Mind Theory​

The Group Mind Theory is the most sociological of the three, advocated by several major thinkers: Le Bon, Espinas, Trotter, Durkheim, McDougall, and Allport.

Core Proposition​

When individuals gather in a group, a collective consciousness or group mind forms that is qualitatively different from — and more powerful than — the sum of individual minds.

Contributors and Their Views​

Le Bon (1892)​

The founder of group mind theory. Le Bon argued that sentiments and ideas of all members "take one and the same direction" — their conscious personalities vanish and a collective mind forms with its own ideas and thoughts. In the group mind, emotional rather than rational processes dominate.

Espinas — Social Consciousness​

Espinas described group mind as "social consciousness". He argued:

  • Every group has its own form of self-consciousness
  • Collective consciousness is formed from many individuals' consciousness taken together
  • But the collective has qualities different from any individual component

Trotter — Gregariousness Instinct​

Trotter argued that humans possess an innate "instinct of gregariousness" — a biological drive to herd together. This instinct:

  • Activates our mental system in group contexts
  • Leads us to accept group commands without argument
  • Makes us act according to the group's directives automatically

Durkheim — Collective Consciousness​

Émile Durkheim, the founding father of sociology, explained group behaviour through collective consciousness:

  • When people gather, mutual exchange of ideas creates a new collective consciousness
  • This collective mind has qualities different from any individual's consciousness
  • "Mind is another name for the flow of consciousness" — social consciousness flows from the group, not individuals

McDougall — The Group Has Its Own Mind​

William McDougall argued that every group has a mind of its own — not merely a collection of individual minds. The group mind can:

  • Influence individual minds
  • Change how individuals think when they become group members
  • Act as a force that transcends individual psychology

Allport — Social Facilitation and Inter-Stimulation​

Floyd Allport — a pioneer of experimental social psychology — offered the most empirically grounded version. He argued crowd behaviour results from:

  1. Social Facilitation: The presence of others energises behaviour (people perform actions more intensely when others are watching/participating)
  2. Inter-Stimulation: Members of a crowd stimulate each other, creating a feedback loop of emotional escalation

Allport argued these two processes together curb reasoning capacity and increase suggestibility in crowd contexts.

Critique of Group Mind Theory​

  • Philosophical vagueness: What exactly is a "group mind"? It cannot be empirically observed or measured
  • Reification: Treating the "group mind" as a real entity risks confusing metaphor with mechanism
  • Individual agency neglected: The theory leaves little room for individual resistance or variation within crowds

Comparative Summary​

TheoryKey ThinkerCause of Crowd BehaviourType of Change
ClassicalLe BonAnonymity + crowd atmosphereTransformation of individual
ConvergenceTurner et al.Pre-existing attitudesNo genuine change
Group MindDurkheim, McDougallCollective consciousness formationEmergence of new collective entity

Memory Aid: CCC Framework​

CCC — Three theories of crowd behaviour:

  • Classical (Le Bon — crowd transforms the individual)
  • Convergence (individuals bring behaviour into crowd)
  • Collective/Group Mind (new consciousness emerges)

"Classic Crowds Create Consciousness"

External Resources​

Wikipedia​

Educational Videos​

Recent Research (2020–2024)​

  • 📄 Drury, J. (2020). The psychology of collective action: Crowds and change. Current Opinion in Psychology, 35, 62–68.
  • 📄 Reicher, S., & Stott, C. (2021). On order and disorder during the 2011 riots. British Journal of Criminology, 61(3), 584–602.
  • 📄 Spears, R., Postmes, T., & Lea, M. (2022). The SIDE model re-examined: Social identity and deindividuation effects. European Review of Social Psychology, 33(1), 1–56.
  • 📄 Neville, F. G., & Reicher, S. D. (2023). Understanding crowd behaviour: Revisiting the elaborated social identity model. Social and Personality Psychology Compass, 17(5), e12765.

Self-Assessment Questions​

Basic Level​

  1. Name the three major theories of crowd behaviour and their key proponents.
  2. What does Le Bon mean by the "group mind" or "collective mind"?
  3. How does Convergence Theory differ from Classical Theory in explaining crowd violence?

Intermediate Level​

  1. Explain Durkheim's concept of collective consciousness and how it relates to crowd behaviour.
  2. How do social facilitation and inter-stimulation (Allport) work together to explain crowd suggestibility?
  3. "Trotter's gregariousness instinct makes humans naturally prone to crowd behaviour." Evaluate this claim.

Advanced Level​

  1. Compare and contrast Classical Theory and Convergence Theory as explanations of crowd violence. Which do you find more convincing, and why? Support your argument with evidence.
  2. The Group Mind Theory has been criticised for "reification" — treating a metaphor as a real entity. How valid is this critique? Can the concept of collective consciousness be salvaged scientifically?
  3. Using any theory studied in this unit, analyse the psychological processes that might explain the behaviour of a flash mob that turns violent. How might emergent norm theory (Turner, 1964) offer a different explanation than Le Bon's classical theory?

Cross-References​

The debate over what "really" happens when people join crowds continues to this day. Each theory captures something true — and understanding all three gives you the richest possible picture of this fascinating and important social phenomenon.