The golden mean

Excellence as the fitting point between excess and deficiency - not the midpoint, but the amount the situation calls for.

Theme: Ethics and character
Tradition: Cross-tradition
Term: 中庸 · zhōngyōng
Term fixed: c. 340 BC

In plain terms

Courage sits between recklessness and cowardice. Generosity sits between extravagance and meanness. Each virtue has two ways of going wrong, one on each side.

The mean is not the average and not moderation. The right amount of anger at a serious injustice is a great deal, and the right amount at a minor inconvenience is none - and both are the mean, because the mean is relative to the case rather than to a scale.

Which is why it cannot be turned into a formula. There is no rule for how much fear is right in a particular danger; there is a person who judges it, and the judgement is the skill. That makes the doctrine unhelpful as a decision procedure and accurate as a description of what going wrong actually looks like.

As a philosopher would put it

Aristotle's mesotēs is a mean between excess and deficiency in both feeling and action, relative to us rather than arithmetically, and determined by reason as the person of practical wisdom would determine it. Some actions and feelings admit no mean - spite, adultery, murder - which is a deliberate limit on the doctrine's scope.

The Confucian zhōngyōng is a different structure with a similar shape. Centrality and equilibrium concern the state before feelings arise and their due measure once they do, and it is a cosmological as much as an ethical notion, linked to sincerity and to harmony between heaven, earth and humanity.

The Buddhist middle way is different again: a path between self-indulgence and self-mortification, established biographically before it is theorised, and later given a metaphysical sense by Nāgārjuna as the middle between eternalism and annihilationism. The three are frequently run together in popular accounts, and doing so loses what each is actually claiming.

Where you meet it

Analgesic prescribing after surgery is a case where both directions of error are documented and consequential.

For decades the recorded failure was undertreatment: audits repeatedly found patients in avoidable pain after operations, and pain was named the fifth vital sign in the 1990s specifically to correct it. Guidance, targets and audit followed.

The correction overshot. Prescribing rose sharply, and by the 2010s the recorded failure had reversed direction in several countries, with review bodies concluding that routine large discharge supplies after minor procedures were unjustified. Guidance was rewritten again.

What clinicians work with now is neither a target nor a maximum but an assessment: this patient, this operation, this history. That is Aristotle's structure exactly - two ways of going wrong, no formula for the point between them, and a judgement that has to be made case by case by someone competent to make it. A profession spent thirty years discovering that the answer could not be a number.

What is actually disputed

Whether the doctrine says anything substantive.

The standard objection is that it is empty: identifying the mean requires knowing what the right action is, so the doctrine describes the answer rather than helping to find it. Defenders reply that this misunderstands its purpose - it is an account of the structure of failure, not a decision procedure, and knowing that there are two ways to go wrong is genuinely informative when most moral advice assumes one.

A second problem is the exceptions. Aristotle exempts some acts from the mean altogether, which means the doctrine does not apply universally and needs a prior account of which cases fall outside it. And treating the three traditions as one idea is a mistake in its own right: the Confucian version is about equilibrium and sincerity, the Buddhist about a path between practices, and neither is a claim about excess and deficiency in a disposition.

Commonly confused with

the average The mean is relative to the situation and the person, not an arithmetical midpoint between two extremes.
the middle way in Buddhism A different claim in a different tradition, about practices and later about metaphysics, and not about excess and deficiency in a disposition.

Defined against

Moral law A rule specifies what to do in advance; the mean insists that the right amount cannot be specified in advance

Philosophers

Aristotle The mean between excess and deficiency
Confucius Centrality and equilibrium, in a cosmological setting
Zhu Xi The Neo-Confucian systematisation of zhōngyōng
Buddha The middle way between indulgence and mortification
Thomas Aquinas The mean absorbed into the account of the virtues

Works

Nicomachean Ethics The doctrine in its Greek form
Analects The Confucian setting
Reflections on Things at Hand Where zhōngyōng is given a Neo-Confucian reading
Summa Theologiae The scholastic treatment
Mulamadhyamakakarika The middle between eternalism and annihilationism

Schools

Peripatetic school (Aristotelianism) Where the doctrine is formulated
Confucianism (classical) Where the parallel structure develops
Cheng-Zhu School Where it becomes systematic
Early Theravada Buddhism Where the middle way is a path rather than a proportion
Madhyamaka Buddhism Where it becomes metaphysical

Related concepts

Virtue c. 340 BC · Wisdom c. 340 BC · Care 1982 · Emotion c. 340 BC · The good life c. 400 BC

Aristotle's mesotēs and the Confucian zhōngyōng are independent formulations of a similar structure, and the Buddhist middle way is a third - which is why the idea is often assumed to be universal and is in fact three different claims.