The Invisible Epidemic: Mass Hysteria Throughout History

Throughout history, human and community responses to events of paranoia have been deemed “social delusion,” “mass hysteria,” or “mass psychogenic illness.” Despite the various classifications, the concept of “mass hysteria” most efficiently explains the way humans react to frightening situations such as the Salem Witch Trials, Cyber Ghost Scare, Nazi Germany, the Red Scare, and the French Reign of Terror through the shared characteristics displayed in each situation: the influence of groupthink, the role of influential authority figures, and the prior existence of instability within a community. To explore the application of mass hysteria in these situations, this paper examines psychological and sociological research involving studies pertaining to fear contagion, authority bias, and community reliance. By identifying patterns displayed in various historical events, the paper reveals how mass hysteria develops, spreads, and intensifies over time. Research conducted on themes of panic, trust, and communication further shapes the findings of this paper to help identify how simple rumors escalate into widespread hysteria. The findings demonstrate that mass hysteria stems from a combination of heightened fear, social pressure, and misinformation that can have destructive social consequences. By dissecting the components that define mass hysteria and exploring the impact these events have had on the world, this paper aims to identify the root causes of mass hysteria and how its societal effects can be mitigated. Understanding the mechanisms by which mass hysteria develops is imperative to prevent future incidents of mass hysteria.

Keywords: mass hysteria, Salem witch trials, sociology, psychology, fear contagion

“She ails as she must-she never walked this morning, but her eyes open and she walks, and hears naught, sees naught, and cannot eat. Her soul is taken, surely” (Miller, 1953, p. 13). This excerpt from Arthur Miller’s The Crucible describes Ruth Putnam, a young girl under the influence of widespread paranoia and ideas of witchcraft that spread during the Salem witch trials. Her symptoms, perceived as supernatural, mirrored those of many others during this period; overwhelming panic and fear gripped the community and led to the executions of around twenty individuals in Salem’s society. This situation is attributed to the effects of mass hysteria afflicting their community, where the psychological torment and isolation severely marred their perceptions of reality and identity. Though the consequences can be observed and analyzed, it is imperative to understand the root causes and what must occur for an event to reach the critical point where it can be classified as mass hysteria. 

As such, what truly is mass hysteria? The definition of mass hysteria is one commonly discussed. Still, the following definition most effectively encompasses the idea: “Mass hysteria…defined as a social phenomenon, consists of collective anxiety due to a perceived threat and can culminate in a cascade of symptoms suggestive of organic disease without an identifiable cause” (Costa et al., 2022). It is a powerful force that often shapes the course of history in the collective choices societies make when face to face with fear, uncertainty, and perceived threats. This concept of “mass hysteria” clearly describes the way humans react to troublesome situations such as the Salem Witch Trials, the Cyber Ghost Scare, Nazi Germany, the Red Scare, and the French Reign of Terror through their shared characteristics of mass hysteria that are reflected in each situation: the influence of groupthink, the role influential authority figures can play, and the preface of an unstable community.

Groupthink

The Science Behind the Phenomenon

The psychological phenomenon of “groupthink” and the rapid spread of fear associated with social interaction is essential to the spread and development of mass hysteria; this idea is starkly portrayed in various events in history, including the Salem Witch Trials, the Red Scare, and the Cyber Ghost Scare. Groupthink refers to the prioritization of collective belief and conformity over rational and individual thinking. In cases of mass hysteria, groupthink amplifies the spread of panic as people feel pressured to conform to the beliefs of other individuals, especially those they trust, such as friends or family. This massive communal emotional response allows hysteria to slowly destroy rationality and logical thinking; fear and panic provoked by hysteria cloud judgment and infiltrate the psyche until reason has been overcome by fear. Mass hysteria is a virus of the most dangerous kind, slowly infecting the mind until a person is so entangled in the web of groupthink that they have lost a sense of who they are entirely. When discussing the science behind “groupthink,” studies conducted on fear contagion display how the perception of fear in one individual can trigger a chain reaction of fear responses in others, causing a collective and heightened state of panic and delusion. A brain structure called the anterior cingulate cortex (ACC) explains this response to another human’s fear (Debiec, 2020). This part of the brain is the most important part in exploring the spread of fear between multiple individuals: “The ACC surrounds the bundle of fibers that connect the left and right hemispheres of the brain and lights up when the person watches another. Studies in animals confirmed that the message about another's fear travels” (Debiec, 2020). 

Psychological and Historical Examples

The Salem Witch Trials represent one of the most famous incidents of “groupthink” in any mass hysteria event to date. The Puritan community, strict and pious, criticized dissent and silenced anyone who dared to speak against the trials. Shared paranoia and the illusion that the “Devil” was among them caused members of Salem’s community to make accusations of witchcraft based on even the slightest misdeed or error. The persistent groupthink escalated to such a point that it affected many deeply on a psychological level, overpowering individual thought and belief. One pertinent example of the presence of groupthink during the trials—as depicted in The Crucible—was when Sarah Good refers to the Devil as “his Majesty,”; this displayed how the incessant accusations she faced caused her to become delusional and accept the idea that she truly was connected to the Devil despite being innocent. This is akin to what Mary Warren experienced, where the constant emotional manipulation and accusations distorted her thinking and made her falsely confess to being involved in witchcraft. She succumbed to pressure from Abigail and the others—her former friends—and ended up a participant in groupthink (Agarwal, 2024). 

Another situation where groupthink was evident was during the Red Scare, where fear of communism spread rapidly. McCarthyism thrived because individuals feared that they would be labeled communist sympathizers if they questioned accusations. Intense fear and the perceived danger communism posed led many Americans to believe that aggressive measures were necessary to protect themselves and their families. The overwhelming desire for “national security” and measures for supposed safety against communists had the adverse effect of fracturing the relationships and livelihoods of millions. During the Red Scare, people were told that communists would infiltrate the world and were hiding as “regular people” in positions such as college professors, school teachers, artists, actors, or journalists. The spread of extreme propaganda further spurred public anxiety and social dissent. In addition, government officials, media, and the public often avoided questioning anti-communist policies out of fear of being labeled communist sympathizers (Miller Center, 2018). 

Another incident of mass hysteria where “groupthink” played a significant role in spreading fear was in the city of Tiruchirapalli in Southern India. The shared belief in a supernatural threat attacking children invoked great fear in the hearts of many of the community’s members, especially those who were parents. Despite being based on a prank, the rumors and stories that spread created a powerful groupthink dynamic, where collective fear and panic overcame sensible thinking. The community, so driven by their paranoia, reacted by agreeing that avoiding potential danger was the safest course of action, even in the absence of proper evidence. A news story was published with a photograph of a young boy posing under a tree with a "ghost" with long loose hair, empty eye sockets, and no legs hovering behind. This sparked rumors of an “internet ghost” and reports that the boy in the photo had gone into a coma and that the classmate who took the photo had died from vomiting blood upon seeing the photo developed. Rumors quickly spread, and parents refrained from sending their children to school or outside to play for fear that their child would be attacked. For weeks after the truth was discovered, psychiatrists were still seeing deeply troubled patients. The actions of a prankster looking for a laugh caused intense collective hysteria that had severe mental health effects months later (Bartholomew and Evans, 2015, p. 111).  Despite the influence of groupthink, it is not only communities themselves that can indirectly or directly cause hysteria; in fact, authority figures often prove to have just as much of an influence.

Authority Bias

The Psychological Basis

The influence of powerful authority figures in impacting the spread of hysteria among communities is additionally a very significant factor present in mass hysteria cases. The concept of authority bias is crucial to understanding how humans respond to large-scale social situations; humans are naturally inclined to believe those they connect with and those they perceive to be in power. The “leader” sets an example for the rest to follow, which can make the spread of propaganda effortless and often pervasive. The more someone in power promotes an idea, the more likely it is that an idea will spread and spiral out of control. Authority bias is known to stem from trust, where humans place faith in those they deem “experts” to guide them on the proper path. An ever-present theme in society portrays how much simpler society finds it to base ideas and judgments on those of others rather than to properly stop and consider the alternatives. Authority bias can be traced back to the beginnings of human civilization, where humans would form hierarchical groups with a leader who was responsible for leading the group to ensure survival and prosperity (Lauren Braithwaite, 2023). In modern times, the pattern repeats, though now by those in authority seeking malicious intent.  

Psychological and Historical Examples

The Salem Witch trials are one situation that clearly displays the role of authority figures in spreading hysteria. 17th-century Salem was characterized by a rigid Puritan society with strong religious beliefs. The people of Salem looked to the court as the highest form of law and religion, as they viewed the court system and laws as derived from the Bible. They had the utmost trust and faith in the court to make decisions that would be in the best interest of the town and that would bring justice (Agarwal, 2024). Thus, the town regarded Judge Danforth, their highly esteemed judge, as the superior authority. However, rather than holding proper trials and allowing the accused the ability to defend themselves, he used his power to instead feed into corruption, hysteria, and his twisted perception of justice. Rather than taking a moment to acknowledge that he could have been wrong, he made hasty decisions that led to the executions of countless innocent people. 

The Red Scare is another prime example of the role that authority figures can play in spreading mass hysteria and depicts how authority bias can cloud perception due to the influence of figures such as Senator Joseph McCarthy and FBI Director J. Edgar Hoover in spreading hysteria. With the tension brewing during this period surrounding communism, more than ever before, the people looked towards authority figures to help them and make decisions that would benefit their lives. McCarthy and Hoover exploited this vulnerability and used their power of authority to present communism as an imminent and dangerous threat to American democracy. Rather than providing any real, substantial evidence, they promoted the use of illustrious and absurd propaganda that engendered even more paranoia. However, because they presented themselves as “saviors” of the country fighting against the “dangerous, vicious communists”, people believed that the widespread actions taken were justified, even if they were based on flimsy accusations. McCarthy and Hoover utilized fear of communism as a basis for unjust accusations and investigations. These accusations often ruined the lives and reputations of the accused, as people would refrain from associating with them for fear that they would be accused of sharing communist sentiments. McCarthy used this method to counterattack anyone who criticized his actions and largely argued against freedom of speech. In Hollywood for example, over three hundred actors, writers, and directors were not permitted to work due to an “informal Hollywood blacklist”. Additionally, the House Un-American Activities Committee (HUAC) conducted highly publicized hearings, interrogating suspected communists in government and spreading preposterous propaganda (Pufong, M, 2023). 

Yet another example of authority bias causing mass hysteria is the Nazi propaganda and the persecution of the Jewish people during the Holocaust by Adolf Hitler. Following World War 1, the German population, dealing with economic hardship and national humiliation, was highly susceptible to the propaganda Hitler spread, placing the blame on the Jewish community and other marginalized groups. Through his extreme propaganda and charismatic speeches, he convinced millions to accept false narratives about the Jewish population being responsible for the totality of Germany’s struggles. While loyalty can be fickle, trust, once established, can lead to unquestioning obedience. Instead of questioning the validity of his claims, the people trusted him as a leader and engaged in blind obedience because he provided them with exactly what they needed at that time: someone who would help protect and look out for them. His ability to forge a connection with his audience became the foundation of his success: “His inability to debate…and his refusal to make small talk [were] considered the mark of a "great man" who lived apart from the crowd. It was the fact that Hitler…could make a connection with his audience that was the basis of all his future success” (Rees, 2012). Although the effect of powerful authority figures in spreading hysteria is significant, mass hysteria is often spurred by tension and discontent brewing in communities preceding the spread of hysteria.

Preceding Instability Within Communities

Effect of Community Resilience 

Furthermore, current evidence effectively demonstrates that mass hysteria is intensified by the presence of previously unstable communities through pre-existing mistrust and fear. Previously unstable communities—those already dealing with social unrest, economic hardship, political tensions, or religious conflicts—easily fall prey to the claws of mass hysteria. The heightened mistrust and fear can spark irrational choices and alter logical thinking. This type of fear becomes easy to exploit, and what begins as a desperation to protect oneself often ends up as deranged paranoia. It allows hysteria to sweep through and completely ravage a community. Research in the field of sociology identifies community resilience as a powerful factor against mass panic and fear. Communities with strong social connections, clear communication, and shared resources tend to be more resilient when facing persistent threats. This fosters trust and belonging within the community, which aids in preventing conflict. It also makes it much less likely for hysteria to escalate to a dangerous point if there isn’t discontent and suspicion to begin with. Fear, greed, and suspicion can prove to be sinister vices that spark terrible actions (Fletcher and Aunger, 2024). There are a myriad of cases that follow this trend, some of which have been able to cause an extensive amount of damage.

Psychological and Historical Examples

Prior to the Salem Witch Trials, Salem’s society had been marked by intense conflict. The combination of social, political, and economic conflict led to a fragmented society full of hostility and tension. This made the town vulnerable to mistrust and fueled bitter jealousy and anger that manifested as accusations. The witch trials validated and amplified the existing paranoia and fear within the community. If the town had a unified, stable community, the situation would not have reached the point it did. Religious standards and norms created a strict set of rules and regulations, and viewed any disobedience as a threat to the community’s survival. Further, the colony's original charter was revoked in 1684; in 1692, the new governor, Sir William Phips, arrived with a revised charter. Tensions were high as the people adjusted to new leadership and restrictions. Many of those accused during the trials were people who held land or wealth, and conflicts over property ownership likely played a role in the accusations. Additionally, violent conflicts with indigenous groups, especially during King Philip’s War (1675-1678) and King William’s War (1688-1697), further enhanced conflict (Menice, 2024). 

Similarly, deep political instability and mistrust preceded the events of the Red Scare, which enabled a swifter and more efficient spread of mass hysteria among the community. People were overcome with agitation and anxiety due to the events occurring at the time. The constant warfare, along with revolutionary movements at the time, created a hostile social and political atmosphere. World War 1 caused many to adopt strong nationalistic and anti-immigrant sympathies, and the rise of communism in Eastern Europe and the spread of communist ideology in China and Korea heightened American apprehensions about national security. The Bolshevik Revolution in Russia, particularly, caused fear to spread about the possibility of immigrants overthrowing the government. Subsequently, domestic instability contributed to the climate of fear. Labor strikes, such as the Boston Police Strike in September 1919, economic uncertainty, and civil rights movements created social and political divisions (Commonwealth of Massachusetts, 2000). This social turmoil made it easy for McCarthy to take advantage of the situation. People felt unsafe among their peers and even those they trusted and loved. Lifelong friendships and connections were severed by mistrust. 

Another example of when previously unstable communities have affected the incidence of mass hysteria is during the French Reign of Terror. The constant inability of leaders to compromise and make crucial decisions about the country led to great uncertainty about the future of the country. Further, the continuous string of executions during the French Revolution prompted more fear and terror.  These conflicts and internal instability allowed radical groups to take power and conduct atrocious investigations and executions. Following the overthrow of the French monarchy and the rise of the French Republic, France was in turmoil. The Jacobins, led by Maximilien Robespierre, and the Girondins were the two dominant revolutionary factions, but they had conflicting ideas for France’s future. This division created an atmosphere of paranoia, where each side viewed the other as a potential traitor to the revolution. Also, France was facing severe economic issues where food shortages, inflation, and widespread poverty had become prevalent (Mark, 2022). It’s essential to take into account not only ongoing factors such as groupthink and authority bias that actively contribute to the spread of hysteria but also the significance of prior instability within communities. As Gordon B. Hinckley once said, “You can't build a great building on a weak foundation.”. 

Conclusion

Tumultuous events in history, including the Salem Witch Trials, the Cyber Ghost Scare, Nazi Germany, the Red Scare, and the French Reign of Terror, demonstrate the disastrous effect of mass hysteria on society. Each of these instances reflects common patterns, encompassing the power of groupthink, the influence of authoritative figures, and the instability of the community beforehand. However, simply reading about and discussing the historical consequences these events have had is not enough to prevent them from happening again. We must understand the ideals that reinforce mass hysteria and how these ideals can escalate to a point where fear corrupts every aspect of a person’s life and breaks even the most precious relationships. We must ask ourselves, “What flaws within our systems and minds allow mass hysteria to thrive?” Only then will we be able to work towards preventing these kinds of scenarios from recurring and costing the lives and livelihoods of thousands more.

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