Classical theories of crowd behavior (G. Le Bon, G. Tarde, S. Moscovici) emphasize its irrationality, deindividuation, and tendency to destructive actions. However, modern research in social psychology and neuroscience demonstrates that powerful forms of altruism —无私的帮助陌生人，在高度匿名性和压力条件下 — can also manifest in crowds. This phenomenon represents a paradox: an environment considered conducive to aggression becomes a catalyst for heroism. Altruism in the crowd is not an exception but a systemic property that arises when biological predispositions, social context, and extreme circumstances collide.
The key mechanism explaining altruistic impulses in crowds is the empathetic response, which has a neurobiological basis in humans.
Mirror neurons and the insula. When observing another person's suffering, the same neural networks are activated in us as when experiencing pain ourselves (anterior insula, anterior cingulate cortex). In a crowd, where emotions are transmitted non-verbally through facial expressions, gestures, and cries (emotional contagion), this activation can be particularly strong and immediate. The crowd does not "depersonalize" at this moment; on the contrary, it hyperpersonalizes the pain of others, making it physically tangible.
Oxytocin and dopamine. A stressful situation in the crowd can trigger the release of oxytocin — a neuropeptide associated not only with attachment but also with increased trust and readiness for cooperation in the face of external threats. At the same time, the act of helping triggers the reward system (ventral striatum), releasing dopamine. In this way, the brain "rewards" the individual for prosocial action even in a chaotic environment.
Interesting fact: A study conducted after the Boston Marathon bombings in 2013 showed that contrary to expectations of panic flight, many witnesses immediately rushed to help the injured, often at the risk of their own safety. Analysis of behavior revealed that the first responders were often people with experience in high-risk environments (military, medics), whose neural response patterns to crises were already "trained".
The classic experiment by Darley and Latane (the phenomenon of the “bystander effect”) showed that the more people present during an emergency, the less likely it is that one individual will offer help, due to diffusion of responsibility (distribution of blame among all) and social influence (the inaction of others is perceived as a signal that help is not needed).
However, in real, highly emotional, and dangerous situations in crowds, this effect can be overcome:
Clear identification of the victim and clarity of the situation. When a suffering person is clearly visible and their need is obvious ("a person has fallen, he is bleeding"), cognitive uncertainty decreases. The crowd does not "freeze," but mobilizes.
Formation of a "rescue team" on the spot. One proactive person who begins to act immediately removes the diffusion of responsibility for others. Their actions become a social norm for a micro-group within the crowd. This creates immediate cooperation among strangers, united by a common goal.
Redefining social identity. In the moment of a catastrophe (terrorist attack, natural disaster), identities such as "fan," "tourist," and "passerby" are replaced by more general ones — "victim" or "rescuer". This creates a powerful sense of community ("we are all in the same boat") and enhances mutual assistance.
Example: During the flood in Krymsk in 2012, local residents, themselves in a difficult situation, saved neighbors and strangers with their boats and floating means of transport, forming spontaneous rescue teams. The crowd often demonstrates emergent self-organization in conditions of catastrophe, not chaos.
Cultural norms. In societies with a high degree of collectivism (such as Japan), prosocial behavior in the crowd is more expected and regulated by internal group harmony norms. After the 2011 earthquake in Japan, remarkable examples of organization and mutual assistance were noted in long lines for food and water, without panic and aggression.
Charismatic leader. A figure may spontaneously emerge in the crowd to take on coordination (screaming "I am a doctor, I need two men!"). This person breaks the cycle of uncertainty and gives others a clear role, transforming a passive mass into an active rescue network.
Level of threat. Paradoxically, moderate threat can increase altruism (mobilization of resources), while extreme, panic threat can suppress it (activating the "fight or flight" survival mode).
From the perspective of evolutionary psychology, altruism in the crowd can be considered as a manifestation of mechanisms honed for group survival.
Reciprocal altruism (R. Trivers): In conditions of close interaction (such as in a crowd), helping a stranger can be an instinctual investment in future interaction — "today I help you, tomorrow you or your kin will help me or mine."
Group selection: Groups within which cooperation and mutual assistance in critical situations are widespread have a greater chance of survival and reproduction than groups where each person is for themselves. Spontaneous altruism in the crowd may be a remnant of this ancient group instinct.
Altruism in the crowd destroys the simplified myth of the "irrational crowd." It demonstrates that even in conditions of anonymity and stress, human psychology retains the ability for empathy, rapid social learning, and cooperation. This state is the result of a complex interaction:
Automatic neurobiological response to another person's pain.
Social-psychological switching from diffusion to acceptance of responsibility.
Thus, the crowd not only serves as a potential source of danger but also as a reserve of spontaneous solidarity. Its behavior is not a predetermined scenario, but a dynamic system where an altruistic act by one person can become a trigger for the transformation of the entire group from a passive gathering into an active community of rescuers. This demonstrates a deeply rooted in human nature potential for prosociality that, at a critical moment, can outweigh egotistic impulses.
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