Saint-Domingue, as Haiti was known under French rule, was the most profitable colony in the world. That wealth was extracted through a slave system of extraordinary brutality. Enslaved Africans on the island's sugar plantations had a life expectancy measured in years, not decades. Henri Christophe's personal secretary, who spent much of his own life enslaved, later tried to explain the massacre by pointing to what Black Haitians had endured at the hands of white slaveholders. The cruelty was not incidental to the colony's economy; it was the engine. When the enslaved population finally rose up in August 1791, they destroyed the plantations of Le Cap and killed the French who lived in the region. A revolution that would last over a decade had begun, and its violence mirrored the violence that had sustained the colony for a century.

The Haitian Revolution was not a single uprising but a grinding, multi-sided war that stretched from 1791 to 1803. Enslaved people fought French colonists. Free people of color fought for their own rights. Spain and Britain intervened. Napoleon Bonaparte sent tens of thousands of troops to retake the colony and restore slavery, and those troops committed their own massacres before disease and Haitian resistance destroyed them. By November 1803, the French army was defeated. On January 1, 1804, Dessalines declared independence. His secretary, Boisrond-Tonnerre, captured the ferocity of the moment: "For our declaration of independence, we should have the skin of a white man for parchment, his skull for an inkwell, his blood for ink, and a bayonet for a pen." After more than a decade of war, Haiti was free. But Dessalines feared the French would return.

The massacre followed an almost identical pattern in every city Dessalines visited. Before his arrival, there were few killings despite his orders. When he appeared, he first recounted the atrocities committed by French commanders like Rochambeau and Leclerc, then demanded the executions begin. In Port-au-Prince, where he arrived on March 18, roughly 800 people were killed and about 50 survived. In Cap-Haitien, killings escalated after his arrival on April 18. Targets were selected by skin color, citizenship, and occupation. Polish and German residents who had defected to the Haitian side or had not participated in the slave trade were spared and granted full citizenship. Priests, doctors, and some American merchants also survived. Before leaving each city, Dessalines would proclaim amnesty for whites still in hiding, but when they emerged, most were killed. At the conclusion, Dessalines declared: "I will go to my grave happy. We have avenged our brothers."

Historians have struggled with how to categorize the 1804 massacre. Scholars Nicholas Robins, Adam Jones, and Dirk Moses call it a "subaltern genocide" -- one carried out by an oppressed group against its oppressors. Historian Philippe Girard classifies it as genocide but notes it "lacks the moral clarity typically associated with genocide," because the French colonists had themselves practiced systematic brutality and would have carried out their own extermination campaign had they won. Trinidadian historian C. L. R. James, in his landmark work The Black Jacobins, wrote that the massacre was "not policy but revenge, and revenge has no place in politics." He argued it doubled the difficulties of a nation already ruined economically. Dessalines himself made no effort to conceal what had happened. In an official proclamation on April 8, 1804, he acknowledged the killings openly, framing them as national self-defense against a population he believed would invite foreign reinvasion and the restoration of slavery.

The massacre reverberated far beyond Haiti's shores. Refugees from Saint-Domingue settled in New Orleans, Charleston, New York, and Baltimore, carrying their accounts with them. In the antebellum American South, the Haitian Revolution became a cautionary tale wielded by defenders of slavery. Southern political leaders pointed to Haiti as proof of what abolition would bring: racial violence and economic collapse. By the time of the Civil War, the perceived failure of emancipation in Haiti was explicitly cited in Confederate discourse as a reason for secession. The 1805 Haitian constitution declared all citizens "black" regardless of skin color and banned white men from owning land. Haiti had created something unprecedented -- a nation born of slave revolt, defined by racial identity, haunted by the violence of its founding. The island below carries the weight of all of it.