What Is Moral Relativism? A Simple Philosophy Guide

People often notice that societies disagree about moral rules. Customs involving family, property, punishment, clothing, food, or social duties can differ greatly across places and periods. Describing that disagreement is called descriptive moral relativism. It is an observation about beliefs, not yet a conclusion about whether all of those beliefs are equally true.

A stronger answer to what moral relativism is makes a philosophical claim. Some forms argue that moral judgments are true or justified only relative to a particular cultural or conceptual framework. If two frameworks contain different standards, they might produce different moral judgments without one neutral standard automatically settling the dispute.

Moral relativism can encourage humility. Your own customs may feel obvious because you grew up with them, not because they are the only possible way to organise human life. Learning about another society can reveal assumptions you had never noticed. Relativist arguments can therefore challenge the habit of treating unfamiliar practices as automatically irrational.

Supporters may also question how universal moral rules could be proven without relying on values that are themselves disputed. When asking what moral relativism is, this challenge matters. If people begin from different ideas about authority, wellbeing, freedom, community, or responsibility, finding a completely framework-independent argument can be difficult.

Critics ask whether strong moral relativism makes it too difficult to condemn serious injustice. If a society approves of an abusive practice, does that approval make the practice right within that society? Critics also ask how moral reform can make sense. Reformers often argue that their own culture is wrong about something, not merely that they personally prefer a different rule.

Another issue is that cultures are not single voices. People within the same society disagree, and individuals can belong to several overlapping communities. A careful discussion of moral relativism therefore needs more than the phrase 'different cultures have different morals.' You should distinguish the fact of disagreement from the deeper philosophical question of whether moral truth itself is relative.

Relativism is often defended as the philosophy of tolerance, and the argument does not quite work. If moral truth is relative to each culture, then a culture that values intolerance is, on its own terms, right to be intolerant, and the relativist has no framework-independent ground to object. Tolerance as a universal value is therefore a claim relativism cannot make without contradicting itself.

Philosophers separate three positions that get blurred together. Descriptive relativism says cultures disagree, which is true. Metaethical relativism says there is no fact about which culture is right, which is the contested claim. Normative relativism says we ought to tolerate other practices, which is a universal moral rule and so not relativist at all. Getting these apart is most of what an essay on the topic needs to do.

One of the oldest illustrations comes from the Greek historian Herodotus. He tells how the Persian king Darius asked some Greeks what price would persuade them to eat their dead fathers' bodies, and they replied that no price would. Darius then asked a people from India called the Callatians, who did eat their dead, what would persuade them to burn the bodies as the Greeks did, and they cried out in horror. Herodotus concluded, quoting the poet Pindar, that custom is king of all. The story is still used to open discussions of relativism.

Philosophers point out that the story may show less disagreement than it seems to. Both groups were trying to honour their dead parents; they differed about which practice showed respect. Many apparent moral disputes work this way, with shared values applied under different factual or religious beliefs, such as beliefs about what happens after death. The philosopher James Rachels made this argument in a widely read introduction to ethics. If much variation comes from different beliefs about the world rather than different basic values, then cultural diversity is weaker evidence for relativism than it first appears.

Moral relativism became a practical question when the Universal Declaration of Human Rights was being drafted. In 1947 the American Anthropological Association sent the United Nations a statement warning that a declaration based on the values of one culture could not simply be applied to all peoples. It drew on the cultural relativism developed by anthropologists such as Franz Boas and Ruth Benedict, who had argued against judging other societies as primitive. Critics later noted that the statement said little about how to respond to abuses, and in 1999 the association adopted a declaration supporting human rights.

Some philosophers defend more modest versions of relativism. Gilbert Harman argued in the 1970s that moral judgments about what someone ought to do make sense only relative to agreements or understandings that person shares. David Wong has defended what he calls pluralistic relativism: there may be more than one true morality, but not every morality is acceptable, because any adequate one must meet human needs such as cooperation and fair treatment. Views like these try to keep relativism's humility while still allowing some practices to be judged as clearly wrong.

Moral relativism is often confused with neighbouring views. Individual subjectivism holds that moral claims are true or false relative to each person's own attitudes, so 'stealing is wrong' means roughly 'I disapprove of stealing'. That makes genuine moral disagreement strangely impossible: if you say stealing is wrong and I say it is not, we are just reporting different feelings and are not contradicting each other at all. Cultural relativism moves the standard from the individual to the group, so two members of the same society can still really disagree about what their shared standards require.

Nihilism points in a different direction. In 1977 the philosopher J. L. Mackie argued that moral claims try to describe objective facts, but no such facts exist, so all positive moral claims are false. That is not relativism, since the relativist thinks moral claims can be true, just relative to a framework. Another family of views, associated with A. J. Ayer in the 1930s, holds that moral statements do not describe anything at all but express approval or disapproval, rather like cheering or booing. Keeping these options apart shows exactly what a relativist is and is not claiming.

Philosophers have long argued about whether ordinary people are relativists, and since the 2000s some have tested the question with surveys, an approach known as experimental philosophy. In one line of studies, participants read about two people who disagree on a moral question and are asked whether one of them must be mistaken. Answers vary with the issue. Most people treat claims such as the wrongness of robbing a bank or of discriminating on the basis of race as almost as objective as plain facts, while treating contested issues such as abortion as closer to matters of opinion. Everyday thinking seems to mix objectivism and relativism.

Another study found that answers also depend on who the disagreement is with. When participants imagined disagreeing with a classmate from their own culture, they usually said one person must be wrong. When the other person came from a very different, isolated society, or was imagined as an alien from another planet, many became more willing to say that both could be right. The researchers suggested that relativist intuitions grow as people try to take another way of life seriously from the inside. Findings like these do not settle whether relativism is true, but they do show which intuitions any theory of morality needs to explain.

Moral relativism is a family of views that connect moral truth or justification to particular frameworks instead of one universal standard. Its appeal includes humility about cultural assumptions, while its challenges include explaining moral criticism, reform, and disagreement within cultures. The debate is about more than simply noticing that people disagree.