The experiment took place in a small basement laboratory at Yale University in the summer of 1961. Forty men, aged 20 to 50, came to the lab in response to a newspaper advertisement offering four dollars for an hour of their time. They were told they were participating in a study of learning and memory. They were introduced to another participant, a mild-mannered accountant in his fifties, who was actually a confederate of the researchers. The two men drew slips to determine who would be the “teacher” and who would be the “learner.” The draw was rigged. The real participant always got teacher.
The learner was strapped into a chair in an adjoining room, with electrodes attached to his arm. The teacher was seated at a shock generator with 30 switches labelled from 15 to 450 volts, with descriptions running from “Slight Shock” through “Danger: Severe Shock,” ending in two switches marked only with “XXX.”
The teacher was told to read word pairs to the learner through an intercom and to administer a shock every time the learner gave a wrong answer. The shocks would increase by 15 volts with each mistake.
The learner did not know the words very well. He made mistakes. Many mistakes.
At 75 volts, the learner grunted. At 150 volts, he demanded to be released, saying his heart was bothering him. At 300 volts, he pounded on the wall and refused to answer any more questions. At 315 volts, he fell silent. Beyond that, the intercom carried only silence, as if the man in the next room had been rendered unconscious or worse.
Whenever the teacher hesitated, the man in the lab coat offered one of four verbal prods. “Please continue.” “The experiment requires that you continue.” “It is absolutely essential that you continue.” “You have no other choice; you must go on.”
What the numbers showed
Stanley Milgram, then a young psychologist at Yale, had asked a panel of psychiatrists to predict how the study would end. Their consensus was that fewer than 1 percent of participants would go all the way to 450 volts. Only sadists, they said, would push the maximum switch while an unresponsive man lay silent in the next room.
In Milgram’s 1963 paper in the Journal of Abnormal and Social Psychology, the actual finding was reported. All 40 of the participants continued past 300 volts. Only after that point did anyone begin to refuse. 26 of the 40, or 65 percent, went all the way to 450 volts. They pressed the maximum switch three times each, as they had been instructed, while the learner made no sound at all.
The participants did not look like sadists during the experiment. They looked distressed. They sweated. They stuttered. They dug their fingernails into their palms. Fourteen of them broke into nervous laughter, an involuntary response to the specific kind of psychological conflict the experiment produced. One participant had a full seizure. But most of them, in that state, continued.
If the Milgram finding is unsettling, it becomes more so when you see the same mechanism play out not in a laboratory over an hour, but in a real high school classroom over five days in 1967.
The traditional reading and its problems
For decades, the dominant explanation has been that people are alarmingly prone to blindly follow authority. If a man in a lab coat tells you to hurt someone, most of you will do it. This reading fitted the historical moment. Milgram had begun his research three months after the trial of Adolf Eichmann in Jerusalem, and part of what he was trying to answer was how ordinary Germans had participated in the Holocaust. His finding suggested they had not been unusual monsters. They had been unusually placed, and they had responded the way ordinary Americans in a Yale basement responded to a similar setup.
But this reading has always sat awkwardly with the fuller data. Milgram ran between 18 and 24 variations of the original paradigm, systematically changing single features to see which ones mattered. Obedience rates varied enormously across conditions, from under 30 percent in some to over 90 in others. If the underlying mechanism were simply “people obey authority,” these numbers wouldn’t have swung so widely with such small changes in setup. Something more particular was going on.
What might actually have been happening
In more recent years, a different reading has emerged. In a 2023 study by Megan Birney, Stephen Reicher, Alexander Haslam and colleagues in the British Journal of Social Psychology, the researchers laid out and tested what they call the engaged followership account of Milgram’s findings. Their argument, developed over more than a decade of work by Reicher and Haslam, is that Milgram’s participants were not blindly obeying the experimenter. They were actively identifying with what they took to be the scientific project of the experiment, and continuing because they had decided the project was worth continuing for.
On this reading, the detail that mattered most wasn’t the lab coat. It was how the experimenter framed the requests. “Please continue” was not obeyed at anywhere near the rate that “the experiment requires that you continue” was. When the experimenter invoked the value of the science itself, participants tended to continue. When he simply asserted his authority (“you have no choice”), obedience actually dropped.
Which is a different phenomenon than blind obedience. It’s about what happens when a person has come to identify with a cause and to see themselves as contributing to it. The teacher in Milgram’s laboratory wasn’t a machine executing orders. He was a person who had come to believe the pain he was inflicting was in service of something that mattered. That’s an interpretive reading of the data, and it isn’t uncontested. But it captures more of what was going on than the simple obedience story does.
What replication actually shows
I want to name something before going further. If any of this is landing heavily because you’re thinking about a situation in your own life where you continued past a point you now wish you’d stopped, this article isn’t the right place to work through that. A therapist familiar with moral injury or the psychology of complicity is better equipped to help.
What the article can do is note what modern replications have found. In a 2009 partial replication published in American Psychologist, the psychologist Jerry Burger of Santa Clara University conducted a modified version of the study designed to be ethically defensible. He stopped participants at 150 volts, the point in the original study after which nearly everyone who continued went all the way to 450.
70 percent of Burger’s participants continued past the 150-volt threshold, compared to 82.5 percent in Milgram’s equivalent condition. The effect had not vanished with cultural change. Whatever mechanism produces this behaviour has persisted through decades of increased public awareness of Milgram’s work.
What this means today
The finding lands differently in 2026 than it did in 1963. The institutional authorities that carried weight in Milgram’s laboratory, the man in the lab coat, the university setting, have lost some of their cultural prestige. But the underlying dynamic Reicher and Haslam described, the tendency of people to identify with a cause and continue past the point where their conscience would normally stop them, hasn’t diminished. It has arguably migrated.
The contemporary version isn’t usually a lab coat in a basement. It’s more often a social movement, a professional environment, or a shared narrative online. The request isn’t usually to press a switch. It’s more likely to be a series of small choices about what to say, what to defend, what to look away from, and what to justify to yourself as necessary to the larger cause you have come to identify with.
Milgram’s original participants, in the follow-up interviews he conducted, mostly said they were glad they had participated. Not because they were proud of what they had done, but because they had learned something about themselves they were not going to be able to unlearn.
Which is probably the most useful legacy of the experiment. Not the number. Not the specific finding about 65 percent. But the underlying observation that ordinary people, in ordinary situations, are capable of continuing well past where they would have thought they’d stop, if the situation has been arranged to make continuing seem like the right thing to do.
What changes is what we identify with, and what we let ourselves be talked into continuing for.
By Kiran Athar. I write about psychology and human development for a general audience. I am not a psychologist, therapist, or clinician. What follows is my reading of the research on obedience to authority, offered as an interpretation.