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Mozi2026-09-09By Anderson#mozi#augustine#just war#pacifism#ethics of war#chinese philosophy

Mozi vs Augustine: Was Mozi Actually a Pacifist?

今至大為攻國，則弗知非，從而譽之，謂之義。 — But when it comes to the great unrighteousness of attacking states, they do not know that they should condemn it; on the contrary, they applaud it, calling it righteous. (《墨子·非攻上》, W. P. Mei trans.)

Short answer: no. Mozi condemned aggression, not war. He trained a corps of siege engineers, sent three hundred of them to hold a city wall, and wrote a chapter licensing punitive campaigns. He and Augustine both end up allowing some wars. They get there by opposite tests.

Key Takeaways

  • The Stanford Encyclopedia is blunt: "Far from being pacifists… they saw a strong defense force as crucial to state survival."
  • Mozi's doctrine is 非攻 — against offensive war (攻), not war. 《非攻下》 calls the sage-kings' campaigns 誅, punishment, not 攻.
  • Augustine's test is inward: the evils of war are "love of violence, revengeful cruelty… and the lust of power" (Contra Faustum 22.74).
  • Mozi's test is arithmetic: a war is condemned by counting what it burns (《非攻中》).
  • So one man polices the heart, the other polices the ledger.

What's the real difference between Mozi and Augustine?

Augustine asks who is ordering this war, and with what in his heart. Mozi asks what does this war cost, and who benefits. Both allow a justified war at the end. But Augustine's justification is a story about intention and authority; Mozi's is a balance sheet. That gap decides everything downstream.

It also decides who they're arguing with. Augustine writes to the man holding the sword: his just-war conditions are addressed to rulers and soldiers who have already decided to fight. Mozi writes to the crowd cheering the sword on. 《非攻上》 opens not with a king but with a thief in an orchard, and the people who correctly condemn him. Mozi's complaint is that those same people reverse themselves once the killing gets large enough.

One framework audits the decision. The other audits the applause. They're answering different questions, which is why they can both permit a war and still disagree about which one.

Was Mozi actually a pacifist?

No, and the label has been circulating long enough to be worth correcting. The Stanford Encyclopedia of Philosophy's entry on Mohism states it plainly: "Far from being pacifists, however, they saw a strong defense force as crucial to state survival." It adds that "some Mohists became specialists in defensive warfare, rushing to the aid of cities and states under threat of attack."

That isn't a footnote to the school. The last quarter of the 《墨子》 is a technical manual of siege tactics, fortification and counter-tunnelling. Mozi didn't write an anti-war pamphlet. He built an anti-war capability and shipped it.

What does 非攻 actually condemn?

It condemns a scale error in public judgment. 《非攻上》 walks a ladder. One man enters an orchard and steals peaches and plums: 「今有一人，入人園圃，竊其桃李，衆聞則非之，上為政者得則罰之。」 Everyone condemns him; the authorities punish him. Steal a dog or a pig — worse. Kill an innocent man and take his coat and sword — worse still.

Then the turn. 「殺一人謂之不義，必有一死罪矣。若以此說往，殺十人十重不義，必有十死罪矣。」 Kill one man, one capital crime; kill ten, ten times over. So what about killing ten thousand? 「今至大為攻國，則弗知非，從而譽之，謂之義。」 We stop condemning and start applauding.

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Notice the target. Mozi isn't primarily indicting the king. He's indicting the moral arithmetic of everyone who watches and calls it righteous. The crime he's naming is inconsistency in the audience, the same instinct he applies to whether you report a colleague you like.

Why does Mozi say war doesn't pay?

Because he counts. 《非攻中》 tallies the bill rather than moralizing over it: 「春則廢民耕稼樹藝，秋則廢民穫斂」 — spring campaigns ruin the planting, autumn campaigns ruin the harvest. Then the materiel: bamboo arrows, standards, tents, armor and shields, halberds and swords and chariots, all counted as "不可勝數" — beyond counting. Then the animals: 「與其牛馬，肥而往，瘠而反」 — the oxen and horses go out fat and come back lean, and the ones that die never come back at all.

This is the same ledger habit that runs through the whole school. Mozi's standard is always what a policy produces, which is why he's so often, and so imprecisely, compared to Western utilitarians, a comparison worked out in Mozi vs Bentham.

How did Mozi leave room for a justified war?

By renaming it. Critics threw the obvious counterexample at him: Yu subdued the Miao, Tang overthrew Jie, King Wu overthrew Zhòu — the sage-kings all fought. 《非攻下》 answers 「彼非所謂攻，謂誅也」: that was not what is called attacking, that is called punishing.

The distinction between 攻 (aggression against the innocent) and 誅 (punitive execution of a tyrant) is the hinge of the whole doctrine. Chris Fraser's study of the Mozi and just war notes that the analogy between just war and criminal punishment is exactly what raises "deep problems for the justification of aggression." Any ruler can describe his war as a punishment.

What test does Augustine apply?

A test about disposition and authority. In Contra Faustum 22.74 he asks: "What is the evil in war? Is it the death of some who will soon die in any case, that others may live in peaceful subjection?" His answer moves the whole question inward: "The real evils in war are love of violence, revengeful cruelty, fierce and implacable enmity, wild resistance, and the lust of power."

He never pretends this is comfortable. City of God XIX.7 grants that "the wise man will wage just wars," then immediately turns on the concession — "as if he would not all the rather lament the necessity of just wars." And XIX.12 makes the strange observation that even aggressors want peace: "even they who make war desire nothing but victory — desire, that is to say, to attain to peace with glory."

Two tests, side by side

Mozi (墨子, c. 470–391 BCE)Augustine (354–430 CE)
Core doctrine非攻 — condemn offensive warJust war within a Christian order
What makes a war wrongIt destroys more than it producesIt's driven by cruelty, vengeance, lust for power
What licenses a warReclassification as 誅, punishmentJust cause, lawful authority, right intention
Where the test looksAt the outcome, publicly countableAt the heart and the office, not fully visible
Attitude to the justified warIt restores orderIt's a necessity to be lamented
What he actually builtA professional siege-defense corpsA framework later codified as just war theory

Whose loophole is more honest?

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Here's the uncomfortable symmetry. Both men leave a door open, and Mozi's is the leakier one.

Mozi's whole case against war is that the arithmetic never works: the seasons burn, the oxen die, the winner is poorer than before. But a punitive expedition burns the same seasons and kills the same oxen. He doesn't re-run the numbers for 誅. He re-describes the war and lets the label do the work. His public test is stronger than Augustine's; his escape hatch is weaker.

Augustine's hatch is at least labelled. He tells you the just war is still a wretched thing and that the person waging it should grieve. Mozi's punitive war comes out the far side looking clean. If you want the version of this problem where the ruler's own nature is the variable, that's Xunzi vs Hobbes.

Did Mozi ever actually stop a war?

The 《公輸》 chapter says he did, and the story is the best argument in the book. Gongshu Ban had built siege ladders for Chu to attack Song. Mozi 「行十日十夜」 — walked ten days and ten nights — to reach the Chu capital.

He argued the king down on grounds of both waste and justice: 「宋無罪而攻之，不可謂仁」, to attack Song, which has done no wrong, cannot be called benevolent. The king agreed in principle and said he was attacking anyway, since the ladders were built.

So Mozi ran a simulation. 「解帶為城，以牒為械」 — he took off his belt for the city wall and laid out wooden slips as machines. Gongshu Ban attacked nine times; Mozi repelled him nine times. Ban's methods ran out; Mozi still had defenses in reserve.

Then the line that ends the war: 「臣之弟子禽滑釐等三百人，已持臣守圉之器，在宋城上而待楚寇矣。」 My three hundred disciples are already on Song's walls with my defensive equipment, waiting. Kill me and it changes nothing. Chu called it off.

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That's the Mohist answer in one scene, and it isn't moral suasion. The argument softened the king; the credible defense stopped him. Compare the strategic tradition that made deterrence explicit in Sun Tzu vs Machiavelli and Sun Tzu vs Clausewitz.

Which test is more useful to you?

Use Augustine's when you're the one deciding, and use Mozi's when you're the one watching. Augustine gives you a mirror: check whether you want this because it's necessary or because you want to win. Mozi gives you an audit: count what it costs, then notice whether you'd condemn the same act at one-thousandth the scale.

Most bad calls — in a war, a lawsuit, a price war — fail Mozi's test long before they fail Augustine's. The arithmetic goes negative while the story still sounds righteous.

A note on texts and translation

The Chinese is quoted from the received 《墨子》: 《非攻上》, 《非攻中》, 《非攻下》, and 《公輸》. The English of the hero quote follows W. P. Mei's 1929 translation. Augustine is quoted from the public-domain Nicene and Post-Nicene Fathers translations — Richard Stothert for Contra Faustum, Marcus Dods for City of God. Mozi's dates are conventionally given as roughly 470–391 BCE and are not firmly established.

For the pattern of calling a Chinese thinker "the Chinese version" of a European one, and where that usually breaks, see Han Feizi vs Machiavelli.

Frequently asked questions

Was Mozi a pacifist? No. He opposed offensive war (攻) while running a school of defensive military specialists. The Stanford Encyclopedia's Mohism entry states that the Mohists were "far from being pacifists" and treated a strong defense as essential to a state's survival.

What is the difference between 攻 and 誅 in the Mozi? 攻 is aggression by a larger state against an innocent smaller one, and it's always condemned. 誅 is punitive action against a tyrant, and 《非攻下》 defends the sage-kings on exactly that ground: 「彼非所謂攻，謂誅也」 — that was punishment, not attack.

Did Mozi and Augustine influence each other? No. They're separated by roughly eight centuries and the whole of Asia, with no transmission between them. The overlap is convergence, two traditions arriving at the same problem, which is that a blanket ban on war can't survive the case of a genuine tyrant.

What are Augustine's conditions for a just war? Across Contra Faustum 22 and City of God XIX, the conditions that later hardened into just war theory are just cause, lawful authority, and right intention. Augustine's emphasis falls on intention: he names cruelty, revenge, and lust for power as the real evils, not the deaths themselves.

Where can I read the primary texts? The 《墨子》 is on ctext in Chinese with English translation. Augustine's Contra Faustum Book XXII is on New Advent, and City of God Book XIX is here.

Sources

Related reading

Put your own situation in front of him

Mozi is most useful when someone is asking you to approve something costly on the strength of how righteous it sounds — a campaign, a lawsuit, a restructuring. He'll make you count it. Ask Mozi directly, or read more on his sage page.

Mozi vs Augustine: Was Mozi Actually a Pacifist? · Hundred Masters