In 1943, Dietrich Bonhoeffer was sitting in a prison cell, writing letters, watching the men he had grown up with move into the machinery of the Nazi state. He was a theologian and philosopher who had already made his name through his writing and his refusal to go along with the regime. From that cell he reached a conclusion that sounds almost provocative in its bluntness: stupidity, he argued, is a greater threat to civilization than even evil. In a short Big Think video, Jonny Thomson unpacks what Bonhoeffer meant by the word, and why he believed stupidity could be broken down into three distinct elements: outsourcing our critical thinking, willful ignorance, and conformity. Each one, Thomson argues, is a way of giving up the labor of judgment, and each is more dangerous than it first appears.
The claim is easy to misread. Bonhoeffer is not saying that a dim-witted person does more damage than a cruel one. Thomson frames the point as a definitional one: stupidity is not a shortage of intelligence but a pattern of behavior, a habit of stepping away from the work of thinking. Evil, in this reading, is a choice that can be named and resisted. Stupidity is harder to pin down because it looks like ordinary life. It is the thing that lets a whole society drift into catastrophe without anyone quite deciding to.
That is why the word matters in a prison cell. Bonhoeffer was not describing abstractions. He was looking at people with the same schooling, the same universities, the same backgrounds, and watching them make a collective decision to stop asking questions. Thomson puts it plainly in the video: Bonhoeffer saw people he grew up with, educated in the same systems, who “suddenly became part of this Nazi operation” (1:34). The surprise was not that bad people existed. It was how many capable people stopped thinking for themselves.
The first element Thomson identifies is outsourcing critical thinking to a third party. That party might be a teacher, a parent, a social media influencer, or a piece of technology. The list is deliberately mixed. Authority has always been a shortcut, and most of the time shortcuts are useful. Nobody re-derives the germ theory of disease before trusting a doctor. The trouble starts when the shortcut replaces the question rather than informing it.
Thomson makes the point concrete with a contemporary example. People now ask ChatGPT, Claude, and other AI tools questions that have always belonged to the individual: whether an action is right, whether to stay in a relationship, which job to take. He lists them in quick succession—“Should I cheat on my partner? Should I stay with my partner? Should I do this job or should I do that job?” (0:47)—and then delivers his verdict: “We are using AI to do the critical thinking for us and that's an example of what Bonhoeffer would call stupidity” (0:57).
“We are using AI to do the critical thinking for us and that's an example of what Bonhoeffer would call stupidity.” — Jonny Thomson, Big Think video (0:57)
The argument here is not that AI is inherently foolish or that asking for advice is a sin. It is that the questions Thomson lists are the ones that define a person. Whether to be faithful, whether to leave, what work is worth a life: these are exactly the decisions where the process of reasoning through them is the point. If a machine returns a tidy answer, the person may gain a conclusion and lose the capacity that would have made the conclusion theirs. Outsourced judgment is judgment you no longer have the muscle for when you need it.
The second element is willful ignorance, and Thomson draws a careful line around it. Ignorance itself is not the problem. Everyone is ignorant of most things. The stupidity lies in what a person does about it. “If you are continuously ignorant and you don't take any steps to resolve your ignorance,” Thomson says (1:02), “this is an example of stupidity.” The failure is not the gap in knowledge. It is the refusal to close it.
To make the distinction vivid, Thomson turns to Socrates. The Oracle of Delphi was reported to have named Socrates the wisest man in the ancient world. Socrates's response, as Thomson recounts it, was the famous admission that the only thing he knew was that he knew nothing at all (1:20). On its face that sounds like the purest ignorance. But Thomson's point is that Socrates was not stupid, because he devoted his life to resolving that ignorance. The admission was the starting point of inquiry, not its end.
This contrast is useful because it separates two postures that look similar from the outside. Both the honest seeker and the willful ignoramus might say “I don't know.” What differs is the next move. One keeps asking. The other treats the blank space as comfortable and declines to fill it. Thomson's framing turns ignorance from a fixed condition into a question of effort, which is both more hopeful and more demanding.
The third element, conformity, is the one Thomson ties most directly to Bonhoeffer's own moment. From his cell in 1943, Bonhoeffer watched people who had shared his education and his schools move into the Nazi operation (1:37). The lesson is uncomfortable because it removes the comforting idea that moral failure belongs to people who are different from us. The people who went along were, in many cases, indistinguishable from the people who resisted, at least on paper. What separated them was the willingness to stop thinking independently when the group began to move.
Thomson connects this to Nietzsche's work Beyond Good and Evil, which he describes as containing an entire chapter devoted to truth (2:00). Nietzsche, in Thomson's summary, argues that philosophers, academics, and writers tend to become fixated on truth as though it had value in and of itself. Looking at the history of humanity and at the present, Nietzsche suggests that most people do not care about truth in that abstract way. What matters more to them is loyalty and identity.
“What matters more is loyalty and what matters more is identity.” — Jonny Thomson, Big Think video (2:21)
Read together, Bonhoeffer and Nietzsche describe the same mechanism from different angles. When belonging becomes the highest value, truth becomes negotiable. Thomson states the consequence directly: “When we conform to some kind of groupthink, we are surrendering our own ability to do critical thinking and we are offloading it to somebody else to do for us” (2:24). Conformity is not only a social habit. It is a transfer of responsibility. The group thinks, and the individual agrees to stop being the one who checks.
Laid side by side, the three elements share a single structure. In each case, a person hands off the work that makes judgment their own. The outsourcer hands it to a machine or an authority. The willfully ignorant person hands it to comfort, declining to look. The conformist hands it to the group. None of these moves feels like giving up in the moment. They feel like reasonable shortcuts, efficient ways of getting through the day. That is part of what makes Bonhoeffer's word so sharp. Stupidity, in this account, is not a lack of capacity. It is the quiet decision not to use it.
This also explains why Bonhoeffer could rank it above evil. Evil usually announces itself, at least to those who want to see it. Stupidity spreads through systems where everyone is busy, where authority is convenient, and where agreement feels safer than inquiry. A society full of people who have stopped thinking can carry out terrible things without any single person feeling that they have chosen them.
The video is brief, roughly two and a half minutes, and Thomson presents it as an overview rather than an extended argument. That brevity is worth respecting. The useful test is not whether one agrees with every step, but whether the three categories help a viewer notice their own habits. Where am I letting someone else answer a question that is mine to answer? Where have I stopped trying to close a gap I could close? Where does my agreement with a group come from conviction, and where does it come from the fear of standing apart?
If this framework lands, the natural next step is to read the sources Thomson points to rather than rely on his summary. Bonhoeffer's writing from prison and Nietzsche's Beyond Good and Evil, particularly the chapter on truth, will give the arguments their full texture. Socrates's own accounts of his questioning, handed down in the dialogues attributed to Plato, show what resolving ignorance looked like in practice.
The more practical exercise is to audit one decision this week. Pick a question you were tempted to hand off, whether to a tool, a parent, a feed, or a crowd. Work through it yourself first, write down your reasoning in a few sentences, and only then consult outside voices. The aim is not to reject help. It is to keep the faculty of judgment in your own hands, so that when you do agree with something, the agreement is yours.
