The Lesson of Melos (image created with AI)
In 416 BC the powerful city of Athens confronted the neutral island of Melos during the Peloponnesian War. The Melians appealed to justice and neutrality. The Athenians answered with the cold logic of power.
“The strong do what they can, and the weak suffer what they must.”
Soon afterwards Athens besieged the island. When Melos fell, the men were executed and the women and children enslaved.
Thucydides recorded this episode not to glorify power, but to expose how international politics sometimes works when survival, fear, and prestige dominate the decisions of states. For Europe today, the uncomfortable relevance of that ancient dialogue is becoming increasingly clear.
Europe’s Great Experiment
For seventy years Europe has pursued one of the most remarkable political projects in history. After two world wars the continent tried something radically different: replacing power politics with rules, institutions, and economic integration. The European Union became a system in which borders opened, sovereignty was shared, and disputes were managed through law rather than force. Inside Europe, that experiment worked astonishingly well. Outside Europe, however, the world never fully adopted the same logic.
The Return of Hard Geopolitics
Over the past decade Europe has rediscovered that it still lives in a wider international system shaped by power. The Russian invasion of Ukraine reminded Europeans that territorial war has not disappeared from the continent. Military strength and deterrence — concepts that many hoped belonged to the past — suddenly became central again. At the same time Europe faces instability along its southern horizon. Tensions involving Iran, Israel, and the United States affect energy markets, shipping routes, and regional stability. A wider conflict in the Middle East would quickly reverberate through Europe’s economy and politics. Above these regional crises lies a deeper transformation: the long-term strategic rivalry between China and the United States, which is reshaping global trade, technology, and alliances. These developments are not separate events. They are parts of a single geopolitical landscape in which the balance of power is shifting again.
Europe Between Power and Rules
Europe today occupies a unique position in that landscape. Economically it is one of the largest powers in the world. The European Union’s combined economy rivals that of the United States and China, and its regulatory influence shapes global markets. Yet in strategic and military terms Europe remains fragmented and still depends heavily on American security guarantees through NATO. This creates a fundamental tension. Europe believes deeply in a rules-based international order. But the stability of that order ultimately depends on power — military, economic, and political — capable of defending it.
The Lesson of Melos
The tragedy of Melos did not happen only because Athens was powerful. It happened because Melos had no reliable structure of power around it: no strong alliances, no credible deterrence, and no ability to shape the strategic environment in which it lived. Europe today is obviously not Melos. It is far larger, richer, and more influential. But the ancient story still raises a question that Europe cannot ignore. A political order based on rules works only when those who believe in it also possess the capacity to defend it. Europe has spent seventy years building one of the most successful political systems in modern history. The challenge of the twenty-first century may be learning how to protect it in a world where power politics has returned.
Further Reading
Thucydides — History of the Peloponnesian War (Book V, Melian Dialogue)
Donald Kagan — The Peloponnesian War
Richard Ned Lebow — The Tragic Vision of Politics
Graham Allison — Destined for War: Can America and China Escape Thucydides’s Trap?
Mark Leonard — The Age of Unpeace
Timothy Garton Ash — Homelands
