I abhor war and view it as the greatest scourge of mankind, by Thomas Jefferson

Thomas Jefferson, Third President of the United States of America

🏴󠁧󠁢󠁥󠁮󠁧󠁿 – I abhor war and view it as the greatest scourge of mankind – Thomas Jefferson

🇮🇹 – Aborrisco la guerra e la vedo come il più grande flagello dell’umanità – Thomas Jefferson

🇪🇸 – Aborrezo la guerra y la veo como el mayor flagelo de la humanidad – Thomas Jefferson

🇵🇹 – Eu odeio a guerra e a vejo como o maior flagelo da humanidade – Thomas Jefferson

🇫🇷 – Je déteste la guerre et je la vois comme le plus grand fléau de l’humanité – Thomas Jefferson

🇮🇳 – मैं युद्ध से घृणा करता हूं और इसे मानव जाति के सबसे बड़े संकट के रूप में देखता हूं – थॉमस जेफरसन

🇷🇺 – Я ненавижу войну и считаю ее величайшим бичом человечества – Томас Джефферсон

🇨🇳 – 我厭惡戰爭，並將其視為人類最大的禍害——托馬斯·傑斐遜

🇩🇪 – Ich verabscheue den Krieg und betrachte ihn als die größte Geißel der Menschheit – Thomas Jefferson

🇸🇦 – أنا أكره الحرب وأنظر إليها على أنها أعظم آفة للبشرية – توماس جيفرسون

There is a sentence attributed to Thomas Jefferson — third President of the United States, principal author of the Declaration of Independence, and one of the most formidable political intellects of the Enlightenment — that has lost none of its urgency in the two and a half centuries since it was written. “I abhor war,” Jefferson declared, “and view it as the greatest scourge of mankind.” Seven words of moral clarity, followed by seven more of devastating judgement. In an age when the language of political leadership has been largely hollowed out into euphemism and spin, there is something almost startling about the directness of it. Jefferson did not say that war was regrettable, or a last resort, or a necessary evil. He said it was a scourge — a word that carries with it the weight of plague, catastrophe, and divine punishment in equal measure.

It is worth pausing on the man behind the words. Jefferson was no pacifist in the absolute sense. He presided over a young republic that was perpetually threatened by the imperial ambitions of European powers, and he understood all too well that nations must sometimes defend themselves. Yet his intellectual formation — shaped by Locke, Montesquieu, and the great juridical traditions of the Enlightenment — led him consistently towards the view that reason, negotiation, and the rule of law were not merely preferable alternatives to war, but the very foundations upon which civilised society must be built. The resort to armed conflict, in Jefferson’s vision, represented nothing less than the failure of reason itself.

That vision feels remote today. Painfully, almost unbearably remote. We live in an era in which war has not been abolished — as the nineteenth-century idealists had dared to hope — but rather normalised, industrialised, and in some quarters, celebrated. The conflicts that have defined the opening decades of the twenty-first century — from the invasion of Iraq in 2003, predicated on intelligence that was at best mistaken and at worst fabricated, to the ongoing devastation in Gaza and now full blown war in the Middle East, to Russia’s full-scale assault on Ukraine launched in February 2022 — share a common and deeply troubling feature: in each case, the mechanisms of international law and diplomacy were not exhausted before force was chosen. In each case, the decision to go to war was made by those in power over the bodies of those with none.

This is not to suggest that diplomacy is a panacea, or that international institutions have always been equal to the challenges placed before them. The United Nations, conceived in the aftermath of the Second World War precisely to prevent the recurrence of such catastrophic violence, has been repeatedly frustrated by the veto powers of its permanent Security Council members — the very states most likely to be parties to the conflicts requiring adjudication. The International Court of Justice, the International Criminal Court, and other bodies of international jurisprudence operate under perpetual constraints of political will and enforcement capacity. These are genuine limitations, and they deserve honest acknowledgement.

But limitations are not the same as futility. The post-war international order, for all its imperfections, has produced the longest period of relative peace among major powers in recorded European history. The institutions of international law, however imperfectly observed, have established norms of conduct that carry real moral and political weight. When states choose to violate those norms — when they launch wars of aggression, when they target civilian populations, when they flout the rulings of international tribunals — the damage extends far beyond the immediate theatre of conflict. It corrodes the entire architecture of trust upon which peaceful coexistence depends.

Jefferson understood this, intuitively and profoundly. He knew that the habits of war, once established, are extraordinarily difficult to break. He knew that military power, once mobilised, tends towards its own perpetuation — that arms industries, standing armies, and the cultures of belligerence they generate become entrenched interests resistant to the counsel of reason. He knew, above all, that the costs of war are never borne equally: that it is invariably the poor, the young, and the powerless who die in conflicts initiated by the wealthy, the old, and the powerful.

In our own time, this asymmetry has become grotesque. The leaders who order air strikes sleep in fortified residences. The generals who plan offensives do so in air-conditioned command centres. The politicians who vote for military action return to their constituencies for the weekend. Meanwhile, in the rubble of Mariupol or Khan Yunis or Mosul, families search for their dead beneath the ruins of homes that once constituted entire worlds.

What would Jefferson make of this? One suspects he would recognise it immediately. The rhetoric of liberty deployed to justify military interventionism; the invocation of security to suppress dissent; the retreat from international obligation whenever such obligations become inconvenient — these are not new pathologies. They are the eternal temptations of power, against which Jefferson warned with the full force of his extraordinary mind.

The antidote he would have prescribed is the same one that remains available to us, however imperfectly realised: the patient, unglamorous, often frustrating work of diplomacy; the strengthening of international legal institutions; the cultivation of those habits of dialogue and compromise that treat the adversary as a party to be persuaded rather than an enemy to be destroyed. These are not weak or naïve alternatives to force. They are, as Jefferson knew, the only alternatives that do not ultimately consume themselves.

War, as he so precisely observed, is a scourge. The word implies contagion — something that spreads, corrupts, and destroys far beyond its initial point of contact. Every conflict normalises the next. Every breach of international law weakens the framework that might have prevented it. Every child killed in a war that need not have been fought is, in some irreducible sense, a monument to the failure of civilisation to take seriously the wisdom it claims to revere.

Jefferson wrote from a world without nuclear weapons, without drone warfare, without the capacity to destroy cities from satellites in space. The scourge he abhorred has since acquired instruments of destruction that would have been unimaginable to him. The argument for finding other means — for insisting on diplomacy, on law, on the slow and painstaking architecture of peaceful resolution — has never been stronger. The will to act upon it has rarely felt weaker.

That gap between wisdom and will is the central moral challenge of our moment. It is, in its way, a challenge that Thomas Jefferson posed to us across the centuries. We have not yet found the courage to answer it adequately.