The Trouble with Not Thinking: Hannah Arendt on Evil, Action, and What Makes Us Human

Here’s a strange thing a philosopher noticed while watching a Nazi war criminal on trial. The man—Adolf Eichmann—had helped organize the murder of six million Jewish people. He was responsible, at least indirectly, for more deaths than almost any person in history. The philosopher, Hannah Arendt, expected to see a monster.

What she saw instead was a boring, ordinary-looking man who spoke in clichés and seemed unable to think for himself. He wasn’t stupid. But when anyone asked him a question that required him to actually think—to see something from another person’s point of view, or to decide what was right or wrong—he simply couldn’t do it. He fell back on slogans he’d heard somewhere: “I was just following orders,” “That’s what the law said,” “Everybody was doing it.”

This bothered Arendt deeply. She started to wonder: Is it possible that the worst evil in the world doesn’t come from monsters? Could it come instead from ordinary people who have simply stopped thinking?

A Short History of a Long Question

Hannah Arendt was a German-Jewish philosopher who had to flee Europe when the Nazis came to power. She lived in Paris for a while, then escaped to New York in 1941. She spent the rest of her life trying to understand what had happened—how could a modern, civilized country like Germany turn into a murder machine?

She published a famous book called The Origins of Totalitarianism in 1951. In it, she argued that Nazi Germany and Stalin’s Soviet Union were not just ordinary dictatorships. They were something entirely new: totalitarian regimes. The goal of these regimes wasn’t just to control people. It was to destroy the very idea that people matter as individuals.

How? By making people feel isolated, lonely, and useless. By destroying any group—families, clubs, churches, friendship circles—where people might form their own opinions. By feeding them simple, all-explaining ideologies (like “history is a race war” or “the working class must triumph”). And by creating concentration camps—which Arendt called “laboratories” where the regime could prove that truly anything was possible, even making human beings completely interchangeable, like parts in a machine.

Arendt thought totalitarianism revealed something terrifying about the twentieth century: that the old rules don’t always work anymore. Traditional morality, religion, and common sense hadn’t stopped the Nazis. Something new was needed if we were going to understand evil and resist it.

Which brings us back to Eichmann.

The Banality of Evil

When Arendt went to Jerusalem in 1961 to watch Eichmann’s trial, she expected to see a fanatic. Instead, she saw what she called “the banality of evil.” She didn’t mean the crimes were banal or ordinary—they were horrifying. But the person who committed them was not a demon. He was a shallow, thoughtless man who had let other people do his thinking for him.

Eichmann didn’t hate Jews, as far as Arendt could tell. He just wanted to be a good employee. He wanted to move up in his career. He wanted to follow orders efficiently. And because he never stopped to ask himself “Is this actually right?” or “What would I do if I had to live with myself after this?”, he became one of history’s worst criminals.

This is what Arendt called thoughtlessness—not stupidity, but a refusal to think. Eichmann could do complex logistics (he organized train schedules for deportations) but he could not do the simple human work of imagining himself in someone else’s shoes.

Arendt began to suspect that the ability to tell right from wrong might be connected to the habit of thinking. Not thinking about philosophy or math, but thinking about your own life: “Can I live with myself if I do this?”

What Are Human Beings For?

To understand why thinking matters so much, we need to look at how Arendt thought about human beings in general. She wrote a book called The Human Condition (1958) where she argued that there are three basic kinds of human activity:

Labor – the things we do to stay alive: eating, sleeping, working to earn money for food and shelter. Labor is about survival. Animals do it too.
Work – the things we make that last beyond us: a table, a painting, a house, a school. Work creates a world that is stable and durable. It’s not just about survival—it’s about building something.
Action – the thing that makes us most human: doing something new, together with others, through speech and deeds. Action is what happens when we appear in public, share our opinions, argue, persuade, and decide together what kind of world we want to live in.

The most important thing about action, for Arendt, is that it requires plurality—the fact that there are many different people, each with their own perspective, and that none of us can see everything from just one angle. Action is what happens when we gather in a public space and work things out together through talking.

This is why totalitarianism was so evil. It didn’t just kill people. It destroyed the possibility of action. It made people so isolated and frightened that they couldn’t gather together and talk freely. It turned them into interchangeable parts, not unique individuals who could start something new.

Action also has a special quality: it’s unpredictable and irreversible. When you act, you start a chain of events you can’t control. And once you’ve done something, you can’t undo it. This is scary—so human beings have developed two special faculties to deal with it:

Promising – we make promises to create small islands of certainty in an uncertain future. “I’ll meet you tomorrow at 3pm.” “I’ll help you with your project.” Promises bind us together.
Forgiving – we forgive each other to release the past’s grip on us. When someone messes up (and everyone does), forgiving allows us to move forward instead of being stuck in revenge or resentment.

Both promising and forgiving require other people. You can’t forgive yourself in a meaningful way, and a promise made only to yourself isn’t really a promise. They are political activities—they require a community.

Thinking as a Moral Activity

Now we can return to the question that haunted Arendt after the Eichmann trial: Can thinking help prevent evil?

She thought yes, in a specific way. Here’s how:

When you think—really think, not just calculate—you enter into a silent dialogue with yourself. You become two-in-one: the “I” who asks questions and the “I” who answers. Socrates (the ancient Greek philosopher) called this “the examined life.” He said that a life without this inner dialogue is not worth living.

This inner dialogue produces something Arendt called conscience. Not conscience as a little voice telling you what to do, but conscience as the awareness that you have to live with yourself. If you do something terrible, you can’t walk away from yourself. You have to wake up every morning and face the person who did that.

Here’s the crucial point: People who think—who regularly conduct this inner dialogue—develop a kind of inner resistance to evil. Not because they’re smarter or more moral, but because they can’t bear to be someone they wouldn’t want to live with.

The Nazis had many clever people working for them. But cleverness is not the same as thinking. Eichmann was clever enough to organize train schedules. He just never stopped to ask: “Can I live with myself if I do this?”

Arendt noticed that the few people who refused to cooperate with the Nazis weren’t necessarily the ones with the strongest moral principles. They were the ones who asked themselves: “What kind of person would I become if I went along with this?” And they decided they couldn’t live with that person.

This is what Arendt meant by thinking as a moral activity. It doesn’t give you answers. But it makes you ask questions—and asking questions can stop you from turning into someone you’d hate.

Judgment and the Enlarged Mentality

Thinking prepares the ground for another mental activity: judging. Thinking loosens up our fixed ideas and habits. It makes us question things. But judging is what we do when we actually have to decide: “Is this right or wrong? Is this beautiful or ugly? Should I do this or not?”

Arendt was particularly interested in political judgment—the kind we need when we have to decide together about things that affect everyone. She thought this kind of judgment requires something she called an enlarged mentality.

An enlarged mentality means being able to see things from many different perspectives at once. Not just your own. Not just your friends’. But imagining how things look from other people’s positions—even people you disagree with.

Here’s the tricky part: This doesn’t mean you have to agree with everyone. It means you have to take everyone into account. Arendt thought that the more perspectives you can hold in your mind while thinking about an issue, the more valid your judgment will be.

This is why debate and discussion matter so much. You can’t develop an enlarged mentality by yourself, in your room, thinking in your own head. You need actual encounters with people who see things differently. You need to hear their arguments. You need to persuade them and be persuaded by them.

Arendt contrasted this with truth—the kind of truth you find in math or science. Two plus two equals four whether you like it or not. You can’t vote on it. You can’t argue about it. Truth compels agreement.

But in politics, Arendt argued, truth can be dangerous. If someone claims to have the absolute truth about how society should be organized, they don’t need to persuade anyone. They can just say: “This is true, so everyone must obey.” This eliminates debate, disagreement, and the diversity of perspectives. It eliminates politics itself.

That doesn’t mean facts don’t matter. Arendt was very clear that facts matter enormously. If people start lying about what actually happened—denying the Holocaust, for example—then political debate becomes impossible. You can’t form good opinions based on lies. Facts and opinions belong together; they just aren’t the same thing.

Why This Matters Now

Arendt died in 1975, but her questions are still alive. We live in a world full of information and full of people who have stopped thinking. Social media encourages us to repeat slogans, not to examine them. We’re pressured to pick a side and stay there. We’re told that certain questions are not worth asking.

But Arendt would say: That’s exactly when thinking matters most. Not when everything is comfortable and easy. When things are confusing, scary, and uncertain. When everyone around you is going along with something that feels wrong. When the old rules have broken down and nobody knows what to do.

Thinking won’t give you easy answers. It might not give you any answers at all. But it will make you someone who can’t be swept along by the crowd. It will make you someone who has to live with yourself.

And maybe—just maybe—that’s enough to make the world a slightly safer place.

Appendices

Key Terms

Term	What it does in the debate
Totalitarianism	An entirely new kind of government that aims to destroy human individuality and make people feel useless and interchangeable
Thoughtlessness	The refusal or inability to think for oneself, to examine one’s actions, or to see things from another person’s perspective
Banality of evil	Arendt’s observation that terrible evil can be committed by ordinary, shallow, unthinking people—not just monsters or fanatics
Action	The distinctively human activity of doing something new in public, together with others, through speech and deeds
Plurality	The fact that there are many different people, each with a unique perspective, and that we need each other to see the full picture
Natality	The fact that every birth brings a new beginning into the world, someone capable of starting something unexpected
Space of appearance	The public space that comes into being whenever people gather together to speak and act politically
Enlarged mentality	The ability to think from many different perspectives at once, not just your own, in order to form better judgments
Conscience	The awareness, produced by thinking, that you must live with yourself and therefore cannot do things you’d hate yourself for

Key People

Hannah Arendt (1906–1975): A German-Jewish philosopher who fled the Nazis and became one of the most important political thinkers of the twentieth century. She argued that the worst evil comes not from monsters but from thoughtless people who refuse to think for themselves.
Adolf Eichmann (1906–1962): A Nazi officer who organized the deportation of Jews to concentration camps. When Arendt watched his trial, she was struck by how ordinary and unthinking he seemed—which led her to develop her idea of the “banality of evil.”
Socrates (469–399 BCE): An ancient Greek philosopher who went around Athens asking annoying questions. Arendt drew on his idea that thinking is a silent dialogue with yourself, and that an unexamined life is not worth living.
Immanuel Kant (1724–1804): A German philosopher whose ideas about judgment and the “enlarged mentality” influenced Arendt’s thinking about how we decide what’s right and wrong in politics.

Things to Think About

Arendt says that thinking—the inner dialogue with yourself—can help prevent evil. But what about people who think very carefully and still do terrible things? Can thinking ever be dangerous, or is it always good?
Arendt thought that totalitarianism was new—not just an ordinary dictatorship. What do you think makes something “new” in history? Could a completely new kind of bad government arise today that we don’t have a name for yet?
If the banality of evil is real, then any of us could potentially do terrible things if we stop thinking. What kinds of situations make it hardest to think for yourself? What makes it easiest?
Arendt valued debate and disagreement in politics. But what happens when people disagree about basic facts? Can you have a productive debate with someone who believes things that aren’t true?

Where This Shows Up

In school: When a teacher asks you to “think for yourself” and you realize how hard that actually is—especially when everyone else is doing the same thing.
In social media: When you catch yourself repeating a slogan you saw online without having actually thought about whether it makes sense. Arendt would call this thoughtlessness.
In group projects: When everyone goes along with a bad idea because nobody wants to be the one to question it. The willingness to ask “Is this right?” is a form of resistance.
In movies and books: Stories like The Wave (about a high school experiment that turns into a Nazi-like movement) or Lord of the Flies explore how ordinary people can do terrible things when they stop thinking. Arendt’s ideas are everywhere in these stories.
In real politics: When citizens argue about what’s true and what’s false, or when leaders try to destroy public debate by claiming to have all the answers. Arendt’s warnings about truth being “anti-political” are still debated today.