From the burning villages of the Morea to the debating chambers of Westminster and Washington, the Greek War of Independence became the first modern crisis to mobilise global public opinion in the name of humanity. Outrage over massacres, famine and enslavement, and powerful foreign interests, transformed a provincial revolt into a test case for a new idea: that distant suffering could justify international intervention and thus war.
The great Romantic poet Lord Byron — branded in England as “mad, bad and dangerous to know” because of his sexual proclivities, scandals, and extravagances — which made him the first near-global celebrity, became for Greeks a national hero. Byron, while seen with a measure of salacious titillation in Britain, is in Greece part of the nation’s modern story and identity.
The Greek struggle resonated far beyond the salons and universities of Europe. It echoed across the Atlantic, where the revolutionary legacy of the Haitian Revolution had already shaken the foundations of empire and slavery. The world’s first Black republic, Haiti, was the first to recognise the Greek revolt and to offer support to the revolutionaries.
In 1822, Haiti’s president, Jean-Pierre Boyer, wrote to Greek leaders expressing solidarity with their struggle. In his message he declared:
“Such a beautiful and just cause cannot leave Haitians indifferent, for we, like the Hellenes, were for a long time subjected to dishonourable slavery and finally, with our own chains, broke the head of tyranny.”
Haiti sent coffee to be sold to fund weapons — an astonishing gesture from a small and impoverished nation that had only just secured its own freedom.
Enlightenment-charged intervention in Greece therefore sat within a much wider revolutionary moment. From former slaves and Haitian freedom fighters to European radicals and abolitionists, diverse actors converged around the Greek cause. They helped spark what some historians regard as the first modern wave of humanitarian intervention.
On 25 March 1821, a messy and bloody uprising by Greeks in what was then an inconsequential province of the vast Ottoman Empire set the world on fire. The revolution played a crucial role in shaping the modern concept of humanitarian intervention.
The idea that citizens of democratic states could pressure their governments to support struggles for freedom abroad — in the Middle East, the Balkans, Africa or Asia — can be traced back in part to the international mobilisation around Greece.
Foreign volunteers and the birth of an international movement
It was the first conflict to enlist foreign philhellenes in an organised effort, and the first time a media strategy was developed to sway public opinion and pressure governments. The London Committee of Philhellenes was set up to garner support for the Greek cause and fund media campaigns aimed at engaging British support. The committee included abolitionists, Irish republicans, liberals, radicals, and evangelists — a motley crew. The most renowned philhellenes were Lord Byron and the philosopher, abolitionist, and anti-imperialist Jeremy Bentham.
Princeton historian Gary J. Bass writes: “Byron and Bentham, the two most important London Committee members, were not just against the Tory government, but of the British Empire.”
It was difficult for Britain to promote freedom from Turkish colonialism while sustaining its own imperial ambitions. The Greeks gained attention among liberals and radicals for their pre-Christian past — idealised by Cambridge and Oxford elites — while Christian evangelicals and abolitionists supported them as fellow Christians rising against Muslim rule and slavery.
African American James Williams, from Baltimore, joined the Greek revolutionary navy. Williams fought alongside Greek forces, participating in a series of naval engagements. He also covertly penetrated enemy lines to gather and relay critical intelligence. In turn, John Zachos and Photius Fisk, orphans of the Greek War of Independence, became abolitionists in America.
U.S. President James Monroe was forced to develop the Monroe Doctrine in direct response to the Greek Revolution. The doctrine shifted American focus to the Western Hemisphere, avoiding entanglement in European affairs. Monroe feared provoking the Holy Alliance — a coalition of Austria, Prussia, and Russia — led by Austrian statesman Klemens von Metternich. In Star of the East: The Holy Alliance and European Mysticism, A. L. Zorin and Daniel L. Schlafly note that Russian Emperor Alexander I of Russia drafted the alliance treaty, later edited by Ioannis Kapodistrias — who would become directly involved in the Greek War of Independence — and his assistant, Aleksandr Sturdza.
The Austrian Emperor and Prussian King found the treaty’s “apocalyptic-messianic rhetoric” unsettling, wary of Russia’s vision of a united Christian world led by Russia. Metternich, despite his scepticism, supported the alliance due to Russia’s military and diplomatic influence after Napoleon’s defeat. Ultimately, Russia was enticed to support the Greeks.
The alliance was a reaction to the French Revolution and Napoleon Bonaparte, and it had backed Spanish colonialism in Latin America — precisely what the Monroe Doctrine sought to counter. America’s political and intellectual class, while sympathetic to the Greeks, remained cautious, avoiding direct involvement. Yet, as public support for the revolutionaries grew in the U.S., abolitionists pointed to the hypocrisy of backing Greek freedom while maintaining African slavery.
Atrocities: The turning point for Greek Independence
International human rights as a cause and rationale for intervention, and war, was given legitimacy by the appalling massacres, expulsions, famine, and slavery exacted by the Ottomans in Massacre of Chios and later by their Egyptian vassals in Morea (the Peloponnese). In Chios, the Turks aimed not just to suppress rebellion but to wipe out the population. Estimates vary, but up to 30,000 civilians were slaughtered, women were subjected to mass rape, and 50,000 — mainly Greeks — were enslaved. French artist Eugène Delacroix’s Scenes from the Massacre at Chios (1824) was inspired by the massacre. The work, first exhibited at the Salon of 1824 in Paris, made a significant impact in support of the Greek cause.
In the Morea, the campaign of Ibrahim Pasha of Egypt devastated the countryside through massacres, deportations, enslavement and the destruction of crops. Accounts suggest up t0 50,000 of civilians died, while up to another 90,000 thousands — particularly women and children — were carried off into slavery in Egypt, contributing to famine and the depopulation of large parts of the Peloponnese during the Greek War of Independence.
The scale of these atrocities could not be ignored, even by those reluctant to intervene in what they saw as a “foreign war”. The crisis culminated in the Battle of Navarino in 1827, where a combined British, Russian, and French fleet led by Admiral Edward Codrington decimated the Ottoman–Egyptian navy, effectively securing Greek independence.
Britain’s Tory Prime Minister George Canning, while sympathetic to the Greeks, sought to avoid direct conflict with the Ottomans. Yet, as Bass highlights, Canning was shocked by Ibrahim Pasha’s brutality in Morea:
“It was so ferocious in its detail, so hopeless of termination, that it became an evil of so extraordinary character as to justify extraordinary interposition.”
That is not to suggest that Greek revolutionaries were innocent of brutality. In Tripolitsa, an Ottoman administrative centre in the Peloponnese, Greek forces led by Theodoros Kolokotronis massacred up to 35,000 Muslim and Jewish men, women, and children. The fortified city, under siege and near starvation, sought to negotiate surrender — but chaos and distrust led to a bloodbath.
Kolokotronis later wrote in his memoirs:
“The [Greek] host which entered it [Tripolitsa] cut down and were slaying men, women, and children from Friday till Sunday. Thirty-two thousand were reported to have been slain. … When I entered Tripolitsa, they showed me a plane tree in the marketplace where the Greeks had always been hanged. I sighed. ‘Alas!’ I said, ‘how many of my own clan — of my own race — have been hanged there!’ And I ordered it to be cut down. I felt some consolation then from the slaughter of the Turks.”
Over 200 years, it is difficult to fully grasp the impact of the Greek Revolution on the modern world — on anti-imperialism, notions of self-determination, patriotism, and nationalism.
The modern Greek state and the Orthodox Church’s emphasis on nationalism and faith for many of us remain contentious. Meanwhile, post-colonial discourse focuses on critiques of European imperialism while overlooking the vast colonial enterprises of non-European powers, such as the Ottoman and Arab empires.