Metaethics - an overview

 Metaethics—the study of what morality actually is (rather than just which actions are right or wrong).

Here is a breakdown of the common views, organized by how they answer the question: "Are moral facts real?"

Moral Realism (The "Objective" View)

This view holds that moral facts exist independently of our opinions, much like scientific facts (e.g., gravity or the shape of the earth).

• The Core Belief: "Killing is wrong" is a fact that is true regardless of what anyone thinks or feels about it. If the whole world voted that killing was okay, the Moral Realist would say the whole world is simply mistaken.

• Analogy: Math. $2+2=4$ is true whether you like it or not.

Moral Anti-Realism (The "Subjective" Views)

This is the broad category for views that deny that objective moral facts exist. It is usually broken down into three specific positions:

A. Moral Relativism (Cultural or Individual)

This is the most common alternative view. It holds that moral statements can be true, but only relative to a specific standpoint.

• The Core Belief: "Killing is wrong" is true for us because our culture says so, but it might be "right" for a different culture (e.g., the Aztecs practicing sacrifice). There is no "God's eye view" to say which culture is correct.

• Analogy: Etiquette or Law. Driving on the left side of the road is "right" in the UK but "wrong" in the US. Neither is objectively correct by the laws of physics; it depends on where you are.

B. Non-Cognitivism (Emotivism)

This view argues that moral statements aren't facts at all—they are expressions of emotion.

• The Core Belief: When you say "Killing is wrong," you aren't stating a fact. You are essentially screaming "Boo on killing!" or expressing a negative feeling. It is neither true nor false; it is just an emotional outburst or a command.

• Analogy: Cheering for a sports team. Yelling "Go Team!" isn't true or false; it's an expression of support.

Error Theory (Moral Nihilism)

This is the skeptical view that moral talk is trying to state facts, but it always fails because moral properties don't exist.

• The Core Belief: "Killing is wrong" is a false statement. But "Killing is right" is also a false statement. Morality is a fiction we invented, like witches or unicorns.

• Analogy: Atheism regarding mythology. If someone asks, "Is Zeus stronger than Apollo?", the Error Theorist says, "Neither, because Greek gods don't exist."

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Quick Comparison Table

View	Are moral claims True/False?	Is morality objective?	"Murder is wrong" means...
Moral Realism	Yes	Yes	"It is an objective fact that murder is wrong."
Moral Relevatism	Yes	No (Relative)	"My culture/society disapproves of murder."
Non Cognitivism	No	No	"Murder? Boo! Don't do it!"
Error Theory	No (All false)	No	"We made up the concept of 'wrongness'; it doesn't exist."

"Soft" Realism (The Middle Ground)

True because we prove/construct them; yes, but

There is a nuanced view often called Constructivism (associated with philosophers like Kant). It argues that morality is "constructed" by human reason. It isn't a floating physical fact like an atom (Anti-Realism), but because all rational humans must agree on it to function, it acts as if it is objective (Realism).

The "Hard" Realist View (Metaphysical Objectivity)

Morality is objective because it exists independently of human minds, like a rock, a planet, or a law of physics.  If all humans vanished tomorrow, the fact "Murder is wrong" would still float around the universe, just like the law of gravity would.

The "Soft" Realist / Constructivist View (Rational Objectivity)

Morality is objective because it is the necessary outcome of correct reasoning. It doesn't exist "out there" like a rock; it exists like a math proof. If all humans vanished, morality would vanish (because there are no minds to reason). However, as long as rational minds exist, there is only one correct answer to moral questions.

It's still objective, since it's not a matter of opinion or culture. If you disagree with a moral fact, you aren't just different you are irrational. You have made a logic error.