Sick Man of Europe
The 19th-century label for the declining Ottoman Empire, and the 'Eastern Question' of who would inherit its lands as it fell apart.

Around 1853, Russia's Tsar Nicholas I is said to have described the Ottoman Empire to a British diplomat as 'a sick man, a very sick man,' one whose estate the great powers should quietly arrange to divide. The exact wording may be polished by legend, but the diagnosis stuck. For the rest of the century, the Ottoman Empire was Europe's sick man: an ailing giant whose expected death raised the most dangerous question in European diplomacy.
The Eastern Question
That question had a name, the Eastern Question: what should the great powers do about the Ottoman collapse everyone saw coming, and who would inherit the wreckage? The symptoms were real. The empire had lost Greece to a war of independence recognized in 1830, was bleeding territory across the Balkans to rising nationalism despite the Tanzimat reforms meant to hold it together, and by the 1870s had defaulted on its enormous foreign debt, eventually surrendering control of its finances to a European-run Public Debt Administration. By the 1878 Congress of Berlin, Serbia, Romania, and Montenegro were fully independent and Bulgaria all but gone. Nationalism was hollowing the empire out from within faster than any invader had managed from without.
Keeping the patient alive
Yet the sick man refused to die, in part because his rivals could not agree on the inheritance. Russia wanted the prize above all: control of the straits at Constantinople, the warm-water gateway from the Black Sea to the Mediterranean. To block that, Britain and France spent decades propping the Ottomans up, most dramatically in the Crimean War of 1853 to 1856, when they fought Russia to keep it out of Ottoman lands. A weak but intact Ottoman Empire suited London and Paris better than a strong Russia on the Mediterranean. Britain in particular feared that a Russia astride the straits would menace the sea route to India, the artery of its empire.
The reading of the will
The propping could not last forever. When the empire finally collapsed after choosing the losing side in World War I, the powers did exactly what the phrase had always implied: they carved it up. The secret Sykes-Picot agreement and the postwar mandates drew the borders of modern Iraq, Syria, Lebanon, and much of the Middle East, lines still bleeding a century later. In a real sense, the sick man's contested deathbed helped set the stage for the war that finally killed him.
The label outlived its patient. 'Sick man of Europe' has since been pinned on Britain in the 1970s, on a stagnant reunified Germany around 2000, and on any economy seen as the region's chronic underperformer. It remains a diplomat's cruelest compliment: an admission that a country still matters mainly because of the scramble over what happens when it is gone. The diagnosis, in other words, has never quite gone out of fashion.