Teotihuacan, City of the Gods. For 2,000 years, a place of pilgrimage. On Monday, a place of blood. Photo: Unsplash
The Contagion of Pyramid Light: How American Mass-Shooting Culture Infected Mexico
A Columbine-obsessed gunman on the Pyramid of the Moon. A school AR-15 attack three weeks earlier. El Salvador putting 486 people in a single trial. Violence is crossing borders in ways cartels never imagined, and nobody is ready for what comes next.
There is a particular horror in watching something ancient become something modern. The Pyramid of the Moon at Teotihuacan has stood for roughly two thousand years. It has seen Aztec pilgrims, Spanish conquistadors, generations of Mexican families posing for photographs against its impossible geometry. On Monday, April 21, 2026, it saw something it had never seen before: a 27-year-old man standing at its summit, firing a handgun at foreign tourists, invoking a massacre that happened in a Colorado high school 27 years earlier to the day.
A Canadian woman, 32, died. Others from Russia, Colombia, and Brazil were treated for gunshot wounds in local hospitals. The gunman, identified as Julio Cesar Jasso Ramirez, killed himself at the scene. In his belongings, authorities found Columbine literature, Columbine images, Columbine manuscripts. A witness told Reuters that visitors heard him reference the attack by name.
April 20, 1999. April 21, 2026. Twenty-seven years apart, almost to the day. The timeline is not a coincidence. It is the point.
Mexico has spent decades living with violence. But the violence it knows is cartel violence: territorial, economic, purposeful in its own grotesque way. What happened at Teotihuacan is something different entirely, and it is arriving at a moment when the country is preparing to co-host the FIFA World Cup in less than seven weeks. The implications reach far beyond one afternoon at one archaeological site. They reach into the question of whether a specific kind of violence - the American kind, the lonely-perpetrator-with-a-gun-and-a-grudge kind - has begun to behave like a virus that no border can contain.
Violence travels. Not just across geography but across categories, from one kind of horror to another. Photo: Unsplash
I. The Pyramid of the Moon, 11 AM
Teotihuacan is roughly 50 kilometers northeast of Mexico City. On any given morning, thousands of visitors climb the Avenue of the Dead, the broad ceremonial walkway that connects the Pyramid of the Moon to the Temple of the Feathered Serpent. The site is majestic in a way that resists cliché. The pyramids are not tombs but stages, built for rituals that scholars still argue about. Human sacrifice, probably. Cosmic renewal, possibly. The past does not explain itself.
On Monday, the ritual was a different kind. At approximately 11:00 local time, Jasso Ramirez climbed to the top of the Pyramid of the Moon and opened fire on the tourists below and around him. Video footage shows people crouching behind ancient stone, crawling down steep steps, frozen in the disorientation of not understanding what is happening because this is not the kind of thing that happens here.
The attorney-general of Mexico State, Jose Luis Cervantes Martinez, was blunt in his assessment. "The aggressor planned and carried out the attack on his own and there is absolutely no indication at this point that he had any external help or that any other individuals were involved in this incident," he said. Among the belongings: a handgun, a bag of cartridges, a tactical knife, and what Cervantes described as "literature, images, manuscripts apparently related to acts of violence which are known may have occurred in the United States in April 1999."
The language is careful. The meaning is not. This was a Columbine copycat at a UNESCO World Heritage site. The first of its kind in Mexico. Probably not the last.
"A moment of transition, a very unfortunate, lamentable and worrying one, towards imitation of the phenomenon of mass killings we see every day in the United States."
II. The Infection Spreads South
Three weeks before the Teotihuacan attack, a teenager walked into his school in the western state of Michoacan with an AR-15 assault rifle and killed two teachers. School shootings in Mexico are extraordinarily rare. Mass shootings by lone perpetrators without cartel affiliation are nearly unheard of. Two in three weeks is a pattern, even if authorities are not yet willing to call it one.
The United States has experienced over 200 mass shootings in 2026 alone, according to the Gun Violence Archive. The American public has largely learned to metabolize this reality: the thoughts and prayers, the vigils, the legislative stalemate, the grim waiting for the next one. But Mexico has not. Mexico's relationship with violence is intimate and specific. It comes with narcotrafficking logos, with territorial signatures, with an economy of threat that makes a kind of terrible sense. What it does not come with, historically, is the anonymous, nihilistic, fame-seeking lone gunman who kills strangers because he can.
This distinction matters more than it sounds. Cartel violence operates within a logic of power and profit. It is horrific, but it is interpretable. The lone mass shooter operates within no logic at all except the desire to be seen, to matter, to enter the canon of infamous names that the internet has made into a perverse hall of fame. When that specific pathology crosses a border, it brings with it a different kind of fear. One that cannot be negotiated with, cannot be deterred by military force, cannot be understood through the frameworks of drug war analysis.
Valeria Villa, the Mexican family therapist who spoke to the BBC, has spent decades working on mental health in a country saturated with violence. She called the Teotihuacan attack "a moment of transition" toward the "imitation of the phenomenon of mass killings we see every day in the United States." But she also identified a crucial domestic factor: cartel violence has desensitized Mexican society. When extreme violence becomes ambient noise, the threshold for what an individual considers possible lowers. The idea of shooting strangers at a pyramid becomes conceivable in a way it would not have been twenty years ago, before the drug war normalized spectacular public violence as a routine feature of Mexican life.
The guns, too, are an American export. Most weapons used in Mexican crimes are smuggled from the United States. The iron river flows south. A legal purchase in Texas or Arizona becomes an illegal weapon in Mexico City. The same pipeline that arms the cartels armed Jasso Ramirez. The United States exports its violence in ways it does not like to acknowledge: not just the guns, but the mythos. The Columbine mythology, the manifesto culture, the perverse celebrity of the mass shooter. All of it travels across the same border that the weapons do.
The border that weapons and mythology both cross. Photo: Unsplash
III. The Columbine Canon and the Globalization of Infamy
Columbine is no longer just an American event. It is the founding text of a global subculture. The two teenage shooters, Eric Harris and Dylan Klebold, have been dead for 27 years. But their influence has only grown. In that time, their writings, their videos, their careful documentation of grievance and planning, have become a template copied by attackers in Finland, Germany, Brazil, Russia, and now, apparently, Mexico.
The Columbine effect works through a specific mechanism: the attacker does not merely imitate the act. He imitates the attention. The mass shooting is, among other things, a performance designed for an audience. The internet has made that audience infinite. Every manifesto posted, every livestream link shared, every name chanted in the digital void confirms the central promise of the act: you will be seen. You will matter. You will enter a canon that is bigger than any single country.
This is what makes the cross-border spread of American-style mass shootings fundamentally different from the cross-border spread of, say, drug trafficking. Drug trafficking follows supply chains and demand curves. Mass shooting contagion follows attention patterns and mythological templates. You cannot cut the supply. The supply is in the air. It is in every news cycle, every true crime podcast, every Wikipedia article about a killer that a lonely young man in Mexico City can read in his bedroom at 2 AM.
Jasso Ramirez's apparent Columbine fixation puts him in a lineage that stretches across continents and decades. The 2007 Jokela school shooting in Finland. The 2009 Winnenden attack in Germany. The 2011 Realengo massacre in Rio de Janeiro. The 2021 Kazan school shooting in Russia. In each case, investigators found references to Columbine. In each case, the attacker was seeking not just to kill but to join. The global village has a dark side, and this is it: the village square where fame is distributed has no border patrol.
"The evidence collected so far pointed to a psychopathic profile of the attacker, characterised by a tendency to imitate situations that occurred in other places, at other times, and involving other individuals - this tendency can be referred to as copycat behaviour."
IV. El Salvador's Answer: 486 on Trial at Once
While Mexico processes a new kind of violence, its Central American neighbor is demonstrating an old kind of response. On the same day the Teotihuacan story broke, El Salvador was holding a mass trial for 486 alleged members of the MS-13 gang. Four hundred and eighty-six people in a single proceeding. The sheer scale is designed to communicate something beyond legal process. It is a statement about what a state is willing to do when it decides that conventional justice is too slow, too porous, too easily gamed by organizations that operate across borders and inside prisons.
President Nayib Bukele's approach to gang violence has been praised for its results: homicides in El Salvador dropped from among the highest in the world to some of the lowest in the Western hemisphere. It has also been condemned for its methods: mass detentions without due process, the suspension of constitutional rights, the effective criminalization of association. Human Rights Watch and Amnesty International have documented abuses. The state of emergency declared in March 2022 has been renewed repeatedly.
The Salvadoran model presents a genuine dilemma. It works, in the narrow sense that fewer people are being killed. It fails, in the broader sense that it suspends the very rights that distinguish a democracy from an authoritarian state. The 486-person trial is a spectacle of efficiency, but it is also a spectacle of erasure. Individual stories, individual claims of innocence, individual circumstances: all subordinated to the needs of the state to demonstrate control.
For countries watching from Mexico and beyond, the temptation of the Bukele model is real. When cartel violence seems intractable and now a new form of mass shooting violence appears on top of it, the appeal of simply suspending the rules becomes powerful. But the Salvadoran experiment also demonstrates the cost: once suspended, the rules do not easily come back. The state of emergency is always temporary until it is not.
Justice at scale: when 486 people sit in one trial, what does "individual" even mean? Photo: Unsplash
V. The World Cup Clock
Seven weeks. That is the time between the Teotihuacan shooting and the opening match of the FIFA World Cup, which Mexico is co-hosting with the United States and Canada. President Claudia Sheinbaum was quick to offer "solidarity" with victims and their families. But solidarity does not address the underlying question that every foreign visitor is now asking: is it safe?
The Sheinbaum administration has pointed to the statistics. Homicides are down 44% from the end of the previous administration. The security strategy is working. But the Teotihuacan attack does not fit the statistics. It is not a cartel hit. It is not part of a territorial dispute. It is a single man with a gun and a mythological obsession, standing on top of one of the most visited archaeological sites in the Western Hemisphere.
This is the specific terror of the lone-wolf attack: it cannot be predicted, prevented, or explained through the security frameworks designed for organized threats. You cannot infiltrate a copycat. You cannot surveil a man whose only conspiracy is with the dead. The National Guard was deployed to Teotihuacan within hours. But the attack was already over. The gunman was already dead. The Canadian woman was already gone.
The World Cup will bring millions of visitors to Mexican cities. Most of them will be fine. The vast majority will go home with memories of warm people, extraordinary food, and a culture that deserves every superlative ever applied to it. But some will have seen the video. Some will have read the headline. Some will decide that a country where a man can shoot tourists at a pyramid is a country where they do not want to bring their children.
The irony is brutal. Mexico has spent years fighting the perception that cartel violence makes it unsafe for tourists. It was finally winning that argument. And then a different kind of violence arrived, one that no amount of security force deployment can reliably prevent, because the threat is not an organization. It is an idea.
VI. The Czech Journalists and the Shape of Resistance
While violence migrates across borders, so does resistance. In the Czech Republic, journalists are threatening to strike over a government plan to scrap licence fees for public broadcasting. The proposal would defund Czech Television and Czech Radio, institutions that have been pillars of independent reporting since the Velvet Revolution. The journalists argue that the move is not about budgets but about control: defund the press, own the narrative, reshape what the public knows.
The Czech strike threat is a small story in the context of pyramids and World Cups. But it belongs in the same frame. When the mechanisms of accountability are weakened, when the press is impoverished or captured, the space for violence to operate without scrutiny expands. The Mexican press has been one of the most attacked in the world for years. Dozens of journalists murdered. Whole regions where reporting means risking your life. When you combine that environment with a new form of violence that thrives on attention and spectacle, you get a toxic feedback loop: violence that craves visibility meets a media landscape that cannot safely provide context.
The Czech journalists are fighting for the right to report. Mexican journalists are fighting for the right to exist. Both fights matter. Both are part of the same ecosystem. When the press retreats, the space fills with rumor, with fear, with the narratives that perpetrators themselves want to create. The Columbine canon does not need traditional media anymore. It has the internet. But the internet does not provide context. It provides amplification.
"When the mechanisms of accountability are weakened, when the press is impoverished or captured, the space for violence to operate without scrutiny expands."
The press under pressure: Czech journalists striking, Mexican journalists dying, the same fight on different scales. Photo: Unsplash
VII. Contagion Theory: Why This Is Different
The academic term for what is happening is "contagion effect." It was first documented in relation to suicide in the 1970s, when researchers found that media coverage of suicides led to spikes in subsequent suicides. The same mechanism applies to mass shootings: extensive coverage of one attack increases the probability of another within days. The effect is well-established in the literature. What is new is its geographic range.
Historically, mass shooting contagion was understood as a domestic American phenomenon. One school shooting led to another, within the same country, within the same media ecosystem. The contagion operated within borders. The internet has dissolved those borders. A young man in Mexico City can consume the same content, worship the same mythological figures, and absorb the same promise of notoriety that a young man in suburban Denver can. The virus has always been contagious. Now the host population is global.
This is the deeper meaning of the Teotihuacan attack. It is not just a shooting at a tourist site. It is evidence that a specific American pathology has completed its journey from local phenomenon to global export. The United States has spent decades arguing about whether mass shootings are a gun problem, a mental health problem, or a culture problem. That argument now belongs to the entire world. Mexico is the first country south of the border to see the copycat pattern emerge so clearly. It will not be the last.
What the data shows
Research published in PLOS One and the American Journal of Public Health has demonstrated that mass killings with firearms occur in clusters. A 2015 study found that the occurrence of one mass killing increased the probability of another within 13 days. A 2019 study extended this finding, showing that media coverage was the primary vector of contagion. These studies analyzed US data. No comparable research exists for cross-border contagion. The field is blind to the very phenomenon it should be studying.
Meanwhile, the flow of weapons continues. The Bureau of Alcohol, Tobacco, Firearms and Explosives has traced the majority of crime guns recovered in Mexico to US sources. The legal purchase becomes the illegal crossing becomes the crime scene. The pipeline that arms the cartels also arms the lone gunmen. The distinction between organized and disorganized violence is meaningless to the bullet.
VIII. What Comes Next
President Sheinbaum faces an impossible calculation. She must reassure World Cup visitors without minimizing what happened. She must maintain the credibility of her security strategy without pretending it can prevent attacks that exist outside the framework of organized crime. She must address a new kind of threat with tools designed for an old one.
There are no easy answers here. The Bukele model in El Salvador addresses organized violence through overwhelming state force, but it cannot reach a man whose only organization is a shrine to dead American teenagers. The American model of thoughts and prayers addresses nothing at all. The European model of strict gun control works better than anything else, but Mexico does not manufacture the guns that kill its people. The guns come from the north. The mythology does too.
What is needed, and what does not yet exist in any functional form, is a transnational framework for understanding and responding to violence contagion. Not intelligence sharing about cartels, which already happens. Not border security, which addresses the weapons but not the ideas. A framework that acknowledges that the most dangerous export of the United States is not a gun or a drug or a movie. It is a myth. The myth that killing strangers makes you matter.
Until that myth is confronted directly, at its source, in the cultural ecosystem that produces and sustains it, the contagion will continue. The pyramids will still stand. The guns will still arrive. And the next time a lonely young man with an internet connection and a grudge climbs something tall, it will not matter what border he is standing behind.
The silhouette on the pyramid could be anyone, from anywhere. That is the problem. Photo: Unsplash
Timeline: Violence Contagion Across Borders
Sources
- BBC News - "No cartels involved - but Mexico's pyramid attack prompts new concerns" (April 23, 2026)
- BBC News - "High-stakes West Bengal election begins as parties row over voter roll" (April 23, 2026)
- BBC News - "Nigeria's suspected coup plotters deny treason charges" (April 22, 2026)
- Al Jazeera - "Sexual violence in the West Bank emerges as tool to intimidate Palestinians" (April 22, 2026)
- BBC News - "He wasn't guilty but delays left this man jailed for five years without trial" (April 23, 2026)
- BBC News - "Why police are seeking to arrest billionaire K-pop mogul behind BTS" (April 22, 2026)
- The Guardian - "El Salvador holds mass trial for 486 alleged members of notorious MS-13 gang" (April 23, 2026)
- The Guardian - "Number of billionaires globally could reach 4,000 in next five years" (April 23, 2026)
- New York Times - "Anti-Trumpism Unites Europe" (April 22, 2026)
- Reuters - Witness testimony from Teotihuacan shooting scene
- PLOS One - "Contagion in Mass Killings and School Shootings" (2015)
- American Journal of Public Health - Mass shooting contagion research (2019)
- ATF - International firearms tracing data for Mexico