Crowd

Crowd
CC BY 2.5 · source
Name	Crowd
Caption	A dense urban assembly
Occupation	Collective assembly
Nationality	Multinational

Crowd A crowd is an aggregation of people gathered in a shared space for a common purpose or coincidentally, characterized by transient social interactions, emergent behaviors, and variable organization. Crowds appear in contexts ranging from Olympic Games venues and Cannes Film Festival red carpets to public demonstrations like the March on Washington and spontaneous gatherings after events such as Super Bowl victories. Studies of crowds draw on observations from incidents including the Hillsborough disaster, the Mecca Hajj crushes, and celebrations at Times Square, informing safety protocols used by agencies like FBI units and municipal New York City Police Department commands.

Definition and types

Definitions distinguish crowds by motivation, composition, and structure: planned assemblies at Wembley Stadium or Madison Square Garden are different from political crowds at Tahrir Square or Zócalo (Mexico City), and from emergent crowds seen after natural events like the 2011 Tōhoku earthquake and tsunami. Classic typologies reference categories such as casual crowds near Trafalgar Square, cohesive crowds at Woodstock (1969)-style festivals, expressive crowds at Stonewall riots commemorations, and acting crowds involved in incidents like the Haymarket affair. Specialized crowds include pilgrimages to Shirdi and Kumbh Mela gatherings, as well as enclaves at cultural events like the Venice Biennale and Burning Man.

Formation and dynamics

Formation mechanisms link to triggering events—announcements from institutions like the United Nations or celebrity appearances at Glastonbury Festival—and to diffusion processes studied in models used by researchers at MIT and Stanford University. Dynamics encompass ingress and egress patterns observed at transit hubs such as Shinjuku Station and Grand Central Terminal, contagion effects compared across episodes like the 1919 Boston Police Strike and contemporary viral mobilizations influenced by platforms like Twitter and Facebook. Mathematical treatments borrow from network analyses applied to phenomena at World Economic Forum meetings and evacuation modeling used after incidents at The Station nightclub fire.

Behavior and psychology

Individual and group psychology in crowds has been examined since studies around Gustave Le Bon and through later empirical work at Harvard University and University of Oxford. Concepts include deindividuation observed during riots such as the Los Angeles riots of 1992, social identity processes documented in protests like the Occupy Wall Street encampments, and emotional contagion found in sporting events at Camp Nou and Fenway Park. Research integrates findings from field data on panic responses at King's Cross fire and from laboratory analogues cited by scholars from London School of Economics and Columbia University. Crowd decision-making has parallels with voting behaviors in contexts like United States presidential election rallies and with rumor spread during crises like the Chernobyl disaster.

Crowd management and safety

Management strategies derive from lessons learned after tragedies such as the Hillsborough disaster and legal frameworks shaped by inquiries into events including the Bradford City stadium fire. Techniques include ticketing and capacity controls used at Wembley Stadium, phased egress applied around Epcot, and cordon-and-hold methods practiced by units in Metropolitan Police Service operations. Technologies involve surveillance systems deployed at Beijing National Stadium, public-address infrastructures used during FIFA World Cup matches, and sensor networks developed in collaborations among Siemens, IBM, and university labs. Training regimes reference guidelines from bodies like FEMA and crowd-control protocols implemented by UEFA organizers for major tournaments.

Crowd-related phenomena and events

Phenomena span benign gatherings such as parades at Macy's Thanksgiving Day Parade and vigils like those following the Paris attacks (2015) to mass incidents including stampedes at Mecca and crushes at pilgrimage sites like Mount Arafat. Iconic events with massive turnout include inaugurations at United States Capitol and festivals such as Carnival (Rio de Janeiro), while flashmobs and viral meetups originate from cultural platforms connected to YouTube and Reddit. Historical episodes of mass mobilization include the French Revolution crowds and the mass demonstrations of Solidarity (Polish trade union); contemporary case studies examine crowd behavior during public health crises like the COVID-19 pandemic.

Cultural and technological aspects

Cultural representations of crowds appear in works like The Triumph of the Will, Les Misérables, and the paintings of Honoré Daumier, while sociological treatments can be found in texts by Émile Durkheim and Max Weber. Technology shapes crowd interaction via ticketing systems from companies such as Ticketmaster, real-time updates on Google Maps, and mobilization through apps developed by startups influenced by platforms like Instagram and WhatsApp. Emerging research by institutions like Carnegie Mellon University and ETH Zurich explores agent-based simulations, wearable sensing used at festivals like SXSW, and ethical debates involving stakeholders including Human Rights Watch and municipal authorities.

Category:Collective behavior