The Trolley Problem

This is another entry in Socratic, a series where I get into philosophy—thought experiments, big ideas, and the questions that live underneath how we think about right and wrong. If you’re new here, welcome. If you’ve been around, good to have you back.

Today’s thought experiment is probably the most famous one in all of philosophy. Academics have written entire careers around it, psychologists have run it as an experiment on thousands of people across different cultures, and even law professors use it on occasion to teach criminal liability. And somehow, despite all of that, there is still no clean answer.

It’s called the Trolley Problem. And once you hear it, it could bother you for a while. I suppose that’s the point of philosophy, right?

Let’s get into it.

The Scenario

Picture this. A runaway trolley is speeding down a track. Its brakes have failed. Ahead of it, five people are tied to the rails, and they can’t move. If nothing happens, the trolley hits them and they die.

You are standing next to a lever. If you pull it, the trolley diverts to a side track. But there is one person tied to that side track. If you pull that lever, one person dies, but if you stand there and do nothing, five people die.

What do you do?

For most people, when they hear this, they say, "Pull the lever." The logic feels obvious, right? Five lives saved at the cost of one is a better outcome than five lives lost. Simple math. It is what a reasonable person would do.

But when faced with that situation, are any of us truly reasonable?

The Footbridge.

Okay now let’s picture this. Same trolley. Same five people on the track. Same unavoidable disaster approaching.

This time, you are standing on a footbridge above the track. Next to you is a large man. A stranger. You notice, with the cold clarity that only thought experiments can give you, that if you push him off the bridge, his body will stop the trolley. He will die. The five people will live.

The math is identical. One life for five. Same trade, but almost nobody pushes the man. Why?

And this is what makes the Trolley Problem one of the most unsettling questions in philosophy, because the numbers are the same, the outcome is the same, but something about the second scenario feels categorically different. It feels wrong even. Most people who had no problem pulling a lever suddenly find themselves unable to push a stranger to his death, even for the exact same result.

The question one asks again is: why?

The Three Approaches

Philosophers have been fighting about this for decades, and the disagreement basically comes down to three camps. If you studied philosophy or jurisprudence in the university (or both, like I did), a few of these names might be familiar to you.

The first of these three camps is the consequentialists, led in philosophy by the tradition of Jeremy Bentham and John Stuart Mill. Their answer is clean: the only thing that morally matters is the outcome. Five lives are worth more than one life. Pull the lever, push the man, or whatever it takes to save the most amount of people. The action that produces the best result is the right action. End of discussion, no further questions.

The second camp is the deontologists, and their most famous voice is Immanuel Kant. For Kant and those who think like him, the outcome is not everything; there are rules. One of those rules is that you cannot use a person merely as a means to an end. When you push the large man off the bridge, you’re not just redirecting harm; you’re treating his body as a tool, using him non-consensually. That, for Kant, is a moral violation regardless of how many lives you save.

The third camp is virtue ethics, which goes back to Aristotle. The question here is not what produces the best result or what rule applies. The question is: what would a person of good character do? And what does your choice say about who you are?

None of these camps fully wins. That’s the honest answer.

Why It Matters

Abstract as it may seem, the trolley is the compressed version of decisions that real systems make all the time.

When a government cuts funding to rural healthcare to redirect resources to an urban hospital, when a judge sentences a young offender harshly to deter others from the same crime, and when self-driving car manufacturers have to program how an autonomous vehicle should react when a collision is unavoidable, those are trolley problems.

In Nigerian law, the criminal defense of necessity touches exactly this territory. The idea behind necessity is that a person can, in extreme circumstances, commit what would otherwise be an illegal act to prevent a greater harm. But Nigerian courts, like most courts globally, are deeply uncomfortable with necessity as a full defense.

The reason traces back to something intuitive. We are wary of systems, legal or otherwise, that calculate whose life is worth more. We are suspicious of the math. Does everyone not deserve an equal chance at life? Whose life is more valuable than the other?

In R v. Dudley and Stephens, which I covered in a previous entry, we see the most direct legal confrontation with this idea. Three sailors on a lifeboat with no food and no rescue in sight. They kill and eat the cabin boy to survive. When they eventually reach the shore, they are tried for murder, and the court convicts them. Even at the brink of death, even with the arithmetic clearly on their side, the law said no. You simply do not get to choose who dies.

The Trolley Problem is asking the same question in a cleaner way. And after centuries of thinking, the honest position is that we do not fully know the answer. We have strong instincts, and we have useful principles, but still there is no consensus. That gap, however, is not a weakness in philosophy. It reflects something true about morality: it is complicated, and anyone who tells you otherwise is probably selling you something.

Where I land.

I’ll be honest. I find myself somewhere between the two positions, and I think that is where most people actually are when they are being truthful.

I would pull the lever, but I wouldn’t push the man.

I think it reflects something real about the difference between redirecting harm and actively weaponizing a person’s body. The disparity between a decision and an act, between a lever and your hands.

The law, interestingly, draws similar lines. It is not only about what happens, but also about how it happens, who does it, and what was intended. Intent matters, and agency does too. The trolley problem just forces you to see that those distinctions, which can feel like legal technicalities, are actually doing serious moral work.

Maybe that’s the point. Not to find an answer, but to understand what the question is actually asking.