Exploring the Depths of Crowd Psychology: Classic and Convergence Theories

Have you ever found yourself caught up in the energy of a crowd – chanting at a sports match, swept along in a protest, or laughing louder than you normally would at a live comedy show? Something shifts when individuals become part of a collective. Crowd psychology is the branch of social psychology that tries to explain exactly what that “something” is, and why it happens. Over more than a century of inquiry, several powerful theories have emerged to decode the forces that govern crowd behavior. Two of the most foundational – classical theory and convergence theory – offer very different answers to the same question: does the crowd change the person, or does the person define the crowd?

The classical theory: when the crowd becomes a mind of its own 🔗

The classical theory of crowd psychology was introduced by the French physician and social theorist Gustave Le Bon in his 1895 landmark work, The Crowd: A Study of the Popular Mind. Le Bon’s central argument was deceptively simple but far-reaching: when individuals join a crowd, they cease to function as independent, rational agents. Instead, they become absorbed into a new psychological entity – what he called the collective mind or group mind.

According to Le Bon, this collective mind is not merely the sum of individual minds. It is a distinct psychological force that makes people feel, think, and act in ways quite different from how each individual would behave in isolation. Individuals in a crowd lose their sense of personal identity, their critical thinking is suspended, and they become overwhelmingly susceptible to shared emotions and group suggestion.

Le Bon identified three key mechanisms responsible for this transformation:

• Anonymity: Being submerged in a crowd removes personal accountability. People feel a sense of invincibility and are less restrained by social norms or personal morals.
• Contagion: Emotions and behaviors spread rapidly through the crowd, similar to how a contagion spreads through a population. One person’s fear or excitement quickly becomes everyone’s.
• Suggestibility: In this anonymous, emotionally charged state, individuals become highly open to the influence of dominant voices or charismatic leaders. The crowd behaves almost like a hypnotized subject, responsive to suggestion and commanding figures.

A key insight from Le Bon is that crowds could assume a life of their own, leading to a collective mindset that drives societal actions – sometimes in unpredictable or destructive directions. His observations were deeply shaped by his witnessing of the Paris Commune of 1871, and the theory was later applied to understanding everything from revolutionary mobs to wartime armies.

The psychological crowd vs. the ordinary crowd 🔗

Le Bon drew a critical distinction between a physical gathering of people and what he called the psychological crowd. Not every assembly of people constitutes a psychological crowd. It is only under specific emotional or situational conditions – when individuals’ conscious personalities begin to dissolve – that the psychological law of the mental unity of crowds comes into effect. At that point, the collective mind becomes dominated by unconscious elements and is subject to a peculiar collective logic. The crowd then thinks and acts as one, guided not by reason but by raw emotion, instinct, and suggestion.

Jung and the collective unconscious 🔗

While Le Bon focused on the crowd as a social phenomenon, the Swiss psychiatrist Carl Jung offered a deeper psychological dimension to the same question. Jung’s concept of the collective unconscious proposes that beyond our personal unconscious – the layer containing our repressed memories and private experiences – there exists a deeper, universal layer of the psyche shared by all human beings.

This collective unconscious is populated by archetypes: primordial images and instincts inherited from our ancestors that manifest across cultures in dreams, myths, rituals, and symbols. Jung proposed that the collective unconscious lies beneath the layer of shared conscious agreements, tapping into innate universal themes that animate human behavior well below the level of rational thought.

In the context of crowd behavior, Jung’s framework helps explain why certain symbols, figures, or emotional narratives can mobilize entire groups with extraordinary force. When individuals gather in a crowd, the collective unconscious may be activated – drawing people into shared primal responses that feel instinctual, almost beyond their control. This is why certain crowd experiences – a religious ceremony, a political rally, a moment of collective grief – can produce reactions that seem to transcend the personal and touch something universal.

An important distinction to note: Durkheim’s collective consciousness captures the conscious agreements that make societal cohesion possible – shared traditions, laws, and cultural norms – whereas Jung’s collective unconscious lies beneath that layer, operating through inherited symbols and instincts rather than conscious social learning.

The group mind theory: a broader framework 🔗

The group mind theory extends Le Bon’s thinking into a larger theoretical tradition, with contributions from several prominent thinkers: Alfred Espinas, Wilfred Trotter, Émile Durkheim, William McDougall, and Floyd Allport. Together, these scholars explored how individual consciousness blends into something collective – and debated how much that collective entity has a mind of its own.

Espinas and social consciousness 🔗

Alfred Espinas, one of the earlier thinkers in this tradition, described the group mind as a form of social consciousness. He argued that every group possesses a kind of self-consciousness, and when the group’s values or culture are threatened from outside, that collective consciousness responds with a unified voice. For Espinas, the group was not just a collection of individuals but an organism with its own awareness.

Trotter and the herd instinct 🔗

Wilfred Trotter, a British surgeon and social psychologist, grounded crowd behavior in biology. His explanation centered on what he called the herd instinct – the deeply human drive toward gregariousness. According to Trotter, this instinct activates an individual’s mental system such that they accept the commands of the group without question, acting in ways that preserve social belonging. In this view, crowd behavior is not pathological – it is a natural expression of a fundamental human instinct to remain within and conform to the group.

Durkheim and collective consciousness 🔗

The French sociologist Émile Durkheim introduced the concept of collective consciousness – the set of beliefs, values, and moral attitudes shared by members of a society that function as a unifying social force. In crowd contexts, Durkheim argued that when people come together, a collective consciousness emerges through the mutual exchange of ideas. Crucially, this collective consciousness is not simply the sum of individual perspectives – much like a chemical compound differs in its properties from its constituent elements, the social consciousness that emerges from a crowd is qualitatively different from, and often more powerful than, the consciousness of any single member.

McDougall and the group mind 🔗

William McDougall, a psychologist known for his work on instinct and motivation, developed the concept of the group mind most systematically in his 1920 book of the same name. McDougall argued that every group has a mind of its own – one that is not a mere collection of its members’ minds but has its own power to influence individual thought. He agreed with Le Bon that crowds tend toward emotional and irrational behavior, but placed a stronger emphasis on the role of instincts, particularly the instinct to follow group leaders and to act aggressively within a group setting.

McDougall also noted that in a crowd, complex individual emotions tend to simplify. The collective emotional experience reverts to the lowest common denominator – more primitive, more intense, and less nuanced than the emotions any individual member would express alone.

Allport’s challenge: back to the individual 🔗

Floyd Allport (1890-1979) fundamentally rejected the notion that a “crowd mind” or “crowd spirit” could exist independently of the individuals who compose it. For Allport, only individuals were psychologically real. He argued that what appeared to be a collective mind was actually the result of the mutual stimulation of individuals upon one another – each person influencing and being influenced by those around them – without any emergent group entity beyond the sum of those interactions.

In Allport’s view, an individual in a crowd behaves just as they would behave alone, only more so – their existing tendencies amplified by the presence and behavior of others. This perspective became the intellectual bridge from classical group mind theory to convergence theory.

Convergence theory: the crowd reflects who you already are 🔗

Convergence theory offers a fundamentally different explanation for crowd behavior. Rather than arguing that the crowd transforms individuals, it proposes that crowds form because like-minded individuals are drawn together. The crowd does not create new behavior – it reveals and amplifies pre-existing attitudes, desires, and motivations.

Convergence theory posits that individuals with shared traits and grievances come together in a crowd, bringing their pre-existing tendencies and motivations with them. A riot, therefore, is not caused by the crowd itself making otherwise peaceful people violent. It is caused by individuals who were already inclined toward hostility converging in the same space and acting on feelings they already held.

According to this theory, crowd behavior is not irrational; rather, people in crowds express existing beliefs and values so that the mob reaction is the rational product of widespread popular feeling. This view rehabilitates the rationality of crowd members to a significant degree – they are not mindless automatons swept away by emotional contagion, but individuals acting on genuine, pre-formed convictions.

Two strands of convergence theory 🔗

There are two main variants within convergence theory. The first focuses on universal human tendencies – the idea that all humans carry latent, sometimes aggressive impulses, and that crowd settings lower the threshold for these to emerge. The second strand emphasizes the homogeneity of crowd composition – the notion that crowds are not random assemblies but gatherings of individuals who already share common traits, grievances, or goals, and that this shared identity drives collective behavior.

Strengths and criticisms 🔗

Convergence theory has real explanatory power, particularly for organized political protests, fan gatherings, or ideologically driven movements – settings where participants clearly share a common purpose. However, it faces a significant critique: it does not fully account for situations where ordinary individuals with no prior radical tendencies engage in extreme crowd behavior. Research on riots, for instance, has found that people involved in crowd violence were sometimes less likely than non-participants to have prior criminal records – suggesting the crowd itself may play a more active transformative role than convergence theory allows.

Classical theory vs. convergence theory: a key comparison 🔗

The central difference between these two frameworks lies in the direction of causation. Classical theory argues that the crowd acts upon the individual – it dissolves rationality, dissolves identity, and installs a collective mind in their place. Convergence theory argues the opposite – that the individual’s pre-existing psychology acts upon the crowd, shaping it from the inside out. The crowd is not the cause of behavior; it is the consequence of the kinds of people who formed it.

Both theories illuminate something real. Classical theory captures the undeniable reality that people do behave differently in crowds – they take risks they wouldn’t take alone, they feel emotions more intensely, and they are more susceptible to influence. Convergence theory correctly observes that not all crowds are the same, and that the composition of a crowd – who shows up and why – matters enormously in determining what happens within it.

Together, these frameworks, along with the group mind contributions of Espinas, Trotter, Durkheim, McDougall, and Allport, form the intellectual foundation of crowd psychology – a field that continues to evolve as researchers apply its insights to everything from emergency evacuations to social media pile-ons.

What do you think? When you have been part of a large crowd, did you feel your behavior or emotions shift in ways that surprised you – and if so, do you think the crowd itself changed you, or were you simply expressing something that was already there? Is the idea of a “group mind” a useful way to understand collective behavior, or does it oversimplify something that is ultimately about individual choices made in a social context?

References

1. https://en.wikipedia.org/wiki/Gustave_Le_Bon
2. https://www.mediastudies.press/pub/emet-le-bon-crowd
3. https://www.ebsco.com/research-starters/history/gustave-le-bon
4. https://pmc.ncbi.nlm.nih.gov/articles/PMC8919694/
5. https://en.wikipedia.org/wiki/Collective_unconscious
6. https://meridianuniversity.edu/content/understanding-the-mystery-of-collective-consciousness
7. https://www.sociologydiscussion.com/theories/major-theories-to-explain-why-the-crowd-behaves-in-a-particular-way/2250
8. https://en.wikipedia.org/wiki/Collective_consciousness
9. https://www.mediastudies.press/pub/emet-allport-social
10. https://en.wikipedia.org/wiki/Crowd_psychology
11. https://www.ebsco.com/research-starters/social-sciences-and-humanities/convergence-theory