Where Do Right and Wrong Come From? A Philosophical Puzzle

Imagine you and your friend are arguing about whether it’s fair for the teacher to give everyone the same grade on a group project, even though some people did way more work than others. You say it’s unfair. Your friend says it’s fair because the project was supposed to be a team effort.

Now imagine someone else walks up and says: “Actually, fairness isn’t real. There’s no such thing as fair or unfair. It’s just an idea people made up.”

That feels wrong too, doesn’t it? Most of us think fairness is real—it’s not just something we invented for fun. But if fairness is real, what kind of thing is it? Is it out there in the world somewhere, like gravity? Is it something we all just agree on? Or is it somewhere in between?

This is the puzzle at the heart of a philosophical debate called “metaethics”—which is just a fancy word for asking: what’s actually going on when we talk about right and wrong? One of the most interesting theories in this debate is called constructivism. It says that moral truths are not discovered out in the world, like scientists discovering a new planet. But they’re also not just made up by individuals, like deciding you like chocolate better than vanilla. Instead, moral truths are constructed—like building a house, but with reasoning instead of bricks.

The Problem With Saying Morality Is “Out There”

Here’s what got the philosophers thinking. Some people think moral truths are real in the same way that rocks and trees are real: they exist independently of us, and we just have to discover them. This view is called moral realism. The problem is that nobody can seem to agree on what these moral truths are. People argue about fairness, justice, and what we owe to each other, and they don’t seem to be able to settle these arguments by pointing to something obvious, like you can with gravity.

Other people think moral truths are just made up—they’re just expressions of how we feel. This view is called moral skepticism or subjectivism. The problem here is that it doesn’t seem to capture what we mean when we say something is really wrong. When you say “it’s unfair to give everyone the same grade,” you don’t seem to just be saying “I don’t like this grading system.” You seem to be saying something that could be true or false, and that could apply to anyone in that situation.

A philosopher named John Rawls noticed this problem and had an idea. He said maybe we’re looking for the wrong kind of objectivity. Maybe we don’t need moral truths to exist like rocks in order for them to be real. Instead, maybe objectivity can come from the way we reason together. This was the beginning of constructivism.

How Constructivism Works: Building Morality From Reason

Here’s the basic picture. Constructivists say that moral truths are the results of a certain kind of reasoning process. If you reason correctly—following the right rules of thinking—you’ll arrive at moral conclusions that are binding on everyone who can reason. The moral truth isn’t “out there” waiting to be discovered; it’s constructed by the activity of reasoning itself.

Think of it like a game. In chess, there are rules that determine what counts as a legal move. Those rules aren’t “out there” in the universe—they were created by people. But once you agree to play chess, you’re bound by those rules. You can’t just decide that your knight can move like a queen because you feel like it. The rules are objective for the game.

Constructivists think morality works something like that. The “game” is being a rational agent—someone who thinks about what to do and can act on reasons. The rules of this game are the principles of practical reasoning. And if you’re playing the game (which you are, because you’re a thinking being who makes choices), then you’re bound by those principles.

The Constitution of Agency

This gets technical, but here’s what it accomplishes. Some constructivists argue that the principles of morality are actually constitutive of being an agent. That’s a fancy way of saying: you can’t be a person who makes choices without already being committed to certain moral principles.

For example, consider the philosopher Christine Korsgaard’s argument. She points out that humans are self-reflective. You don’t just have desires—you can think about your desires. You can ask: “Should I really want this? Is this a good reason to act?” This ability to reflect creates a problem. If you just followed whatever desire was strongest, you wouldn’t be making choices—you’d just be pushed around by your feelings. To actually be in charge of your own actions, you need principles to govern which desires you act on.

Korsgaard argues that the only principles that can work for this job are universal ones—principles that could apply to anyone in your situation. And once you accept that, you’ve already committed yourself to something like the Golden Rule or the idea that you shouldn’t make exceptions for yourself. You haven’t discovered this rule out in the world; you’ve constructed it by trying to be an agent at all.

A Concrete Example

Let’s make this concrete. Suppose you’re deciding whether to cheat on a test. You really want a good grade, and you might be able to get away with it. But you also think cheating is wrong. Where does that “wrongness” come from?

A realist says: wrongness is a real property of cheating, like its difficulty level. You can discover it.

A subjectivist says: wrongness is just your feeling of disapproval. You’re saying “boo, cheating!”

A constructivist (like Korsgaard) says: when you reflect on whether to cheat, you’re asking yourself a question: “Is this something I have a good reason to do?” To answer that question, you need to think about what principles you could accept. Could you accept a principle that says “it’s okay to cheat whenever you can get away with it”? Probably not, because that would mean other people could cheat on you too, and you wouldn’t want that. So the wrongness of cheating isn’t discovered—it’s constructed by the process of asking yourself what you can reasonably will as a universal rule.

A Challenge: The Euthyphro Problem

But here’s where things get tricky. There’s a famous objection to constructivism that goes back to Plato. It’s called the Euthyphro problem, and it comes in two versions.

First version: Either the reasoning process that constructs moral truths is constrained by some moral standards, or it isn’t. If it isn’t constrained, then the results could be anything—maybe a perfectly consistent reasoning process could lead to terrible moral conclusions. If it is constrained, then those constraints aren’t themselves constructed, which means constructivism is secretly relying on pre-existing moral truths.

Second version: Either the principles of reasoning that constructivists appeal to (like “be consistent” or “treat others fairly”) are themselves constructed, or they aren’t. If they aren’t constructed, then constructivism has to admit that some norms are just given—and that looks like realism. If they are constructed, then we need other norms to construct those norms, and we get an infinite regress.

Constructivists have responses to this. Some say the regress isn’t vicious—it’s just how reasoning works. Reasoning about reasoning is circular, but it’s a kind of “virtuous circle” where we check and refine our principles over time. Others say the constitutive norms of agency are special: they’re not chosen, but they’re not discovered either. They’re just what you’re already committed to by the fact that you’re a thinking, choosing being.

The Big Picture

So where does this leave us? Constructivism offers a middle path between saying morality is “out there” like a rock and saying it’s “just made up.” It says moral truths are real, but they’re real in the way that the rules of logic are real—they’re things you can’t escape if you want to think and act rationally.

Different philosophers disagree about exactly how this works. Some (like Rawls and O’Neill) emphasize the social aspect: moral truths are what free and equal people could agree to. Others (like Korsgaard) emphasize the individual aspect: moral truths are what you must accept if you want to be a genuine agent. Some think constructivism works for all moral questions; others think it only works for questions about justice and fairness.

Nobody has fully settled the debate. That’s part of what makes it interesting. The next time you find yourself arguing about what’s fair or right, you might ask yourself: where does this “rightness” or “fairness” come from? Is it out there? Is it just in my head? Or is it something I’m building, right now, with the very act of reasoning about it?

Appendices

Key Terms

Term	What It Does in This Debate
Constructivism	The view that moral truths are produced by correct reasoning, not discovered like facts about the world
Moral realism	The view that moral truths exist independently of what anyone thinks or feels
Subjectivism	The view that moral statements are just expressions of personal feelings or attitudes
Constitutive norm	A rule that defines what something is—if you break it, you’re not really doing that thing anymore
Autonomy	Self-governance: being ruled by principles you give to yourself, not by outside forces or unreflective desires
Euthyphro problem	The challenge that either the standards for constructing morality are arbitrary or they secretly rely on pre-existing moral truths
Constitutivism	A strategy within constructivism that grounds moral norms in the very nature of being an agent

Key People

John Rawls (1921–2002): An American philosopher who revived Kant’s ideas and argued that moral and political principles could be constructed through fair procedures, like people deciding on rules without knowing their own advantages in life.
Christine Korsgaard (born 1952): A contemporary philosopher who argues that moral obligations come from the fact that we are self-reflective agents who must govern ourselves by universal principles.
Onora O’Neill (born 1941): A British philosopher who develops a version of constructivism that emphasizes our finitude and interdependence, and the need for principles that all could follow.
Immanuel Kant (1724–1804): The German philosopher who first proposed that morality is a matter of self-legislation—giving laws to ourselves through reason—rather than following external commands.

Things to Think About

The constructivist says moral truths are “constructed” by reasoning. But what counts as “correct reasoning”? If two people reason carefully and reach different moral conclusions, does that mean one of them is just reasoning badly? Or could there be multiple valid moral systems?
Korsgaard says that to be an agent at all, you must commit to universal principles. But can you imagine someone who is a perfectly coherent, rational agent who genuinely believes that only their own interests matter? The philosopher David Hume thought so. Who do you think is right?
If moral truths are constructed by human reasoning, what happens when humans reason differently at different times in history? Are some past societies’ moral beliefs (like those that accepted slavery) just objectively wrong by our standards? Or were they right for their time? Constructivists disagree about this.
The Euthyphro problem asks: does God command things because they’re good, or are they good because God commands them? Replace “God” with “reason” and you get the challenge for constructivism. Can you see why this is hard to answer?

Where This Shows Up

Political debates: When people argue about whether laws should be based on what “everyone can agree to” versus “what is truly just,” they’re channeling the constructivism vs. realism debate.
School rules: When a class discusses and votes on classroom rules, they’re constructing norms together—a miniature version of what constructivists think morality is like.
Video game ethics: Gamers argue about what’s “fair play” in online games. These arguments often assume that fairness is constructed by the community and its rules, not something written in stone.
Friendship conflicts: When you apologize to a friend and say “I should have known that would hurt you,” you’re treating moral knowledge as something that comes from understanding other people’s perspectives—which is close to what constructivists think moral reasoning requires.