John Stuart Mill in "The Contest in America", in Dissertations and Discussions, vol. 1 (1868), p. 26; previously published in Harper's New Monthly Magazine, Volume 24, Issue 143 (April 1862), page 683-684.

But war, in a good cause, is not the greatest evil which a nation can suffer. War is an ugly thing, but not the ugliest of things: the decayed and degraded state of moral and patriotic feeling which thinks nothing worth a war, is worse. When a people are used as mere human instruments for firing cannon or thrusting bayonets, in the service and for the selfish purposes of a master, such war degrades a people. A war to protect other human beings against tyrannical injustice – a war to give victory to their own ideas of right and good, and which is their own war, carried on for an honest purpose by their free choice – is often the means of their regeneration. A man who has nothing which he is willing to fight for, nothing which he cares more about than he does about his personal safety, is a miserable creature who has no chance of being free, unless made and kept so by the exertions of better men than himself. As long as justice and injustice have not terminated their ever-renewing fight for ascendancy in the affairs of mankind, human beings must be willing, when need is, to do battle for the one against the other.

— John Stuart Mill on Just war theory

What It Means

This is a placeholder explanation generated by the low-overhead model. It interprets "But war, in a good cause, is not the greatest evil which a nation can suffer. War is an ugly thing, but not the ugliest of things: the decayed and degraded state of moral and patriotic feeling which thinks nothing worth a war, is worse. When a people are used as mere human instruments for firing cannon or thrusting bayonets, in the service and for the selfish purposes of a master, such war degrades a people. A war to protect other human beings against tyrannical injustice – a war to give victory to their own ideas of right and good, and which is their own war, carried on for an honest purpose by their free choice – is often the means of their regeneration. A man who has nothing which he is willing to fight for, nothing which he cares more about than he does about his personal safety, is a miserable creature who has no chance of being free, unless made and kept so by the exertions of better men than himself. As long as justice and injustice have not terminated their ever-renewing fight for ascendancy in the affairs of mankind, human beings must be willing, when need is, to do battle for the one against the other." in the context of "John Stuart Mill in "The Contest in America", in Dissertations and Discussions, vol. 1 (1868), p. 26; previously published in Harper's New Monthly Magazine, Volume 24, Issue 143 (April 1862), page 683-684." to mean that wisdom is timeless.

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Source: Wikiquote: "Just war theory" (Quotes) The 'What it means' explanation text was generated by Google Gemini Flash (accessed January 18, 2026). https://gemini.google.com/app
John Stuart Mill

About John Stuart Mill

John Stuart Mill (20 May 1806 – 8 May 1873), also known as J. S. Mill, was an English political philosopher and economist who was an advocate of utilitarianism.