For more than a century, scholars have argued over the size of the Indigenous population of the Americas on the eve of European contact. The debate has been especially fierce in North America, where the early twentieth‑century “low counters”—James Mooney, Alfred Kroeber, and their successors—estimated modest pre‑contact populations, while the postwar “high counters,” led by Woodrow Borah, Sherburne F. Cook, and Henry F. Dobyns, insisted on vastly larger numbers. Dobyns, the most influential of the high counters, placed the pre‑contact population of the New World at an astonishing 90 million, including 18 million north of the Rio Grande. These figures, resting on speculative multipliers and heroic extrapolations, reshaped the historiography of the Americas for decades.
The debate has always involved more than numbers. Embedded within it are three separate claims: the size of the population, the causes of its collapse, and the moral meaning of that collapse. For generations these have been treated as a single question: How many Indigenous people lived on Hispaniola in 1492, and what does their subsequent disappearance say about Spanish rule? The genomic evidence now forces us to disentangle them. Genetics can tell us who was related; genomics can tell us how many people there were.
Nowhere has this debate been more consequential than in the Caribbean, the first point of sustained contact between Europeans and the Indigenous peoples of the Western Hemisphere. Hispaniola—today divided between Haiti and the Dominican Republic—was the cradle of Spain’s American empire, the site of the earliest encomiendas, and the stage on which the first catastrophic population collapse unfolded. For generations, historians have repeated population estimates for Hispaniola ranging from 250,000 to 1 million inhabitants in 1492. These numbers, though lower than the extravagant claims of the sixteenth century, still assume a large, densely settled island society.
Map of Hispaniola from Giovanni Battista Ramusio’s Navigationi et Viaggi (1556)
But a new line of evidence has entered the debate—one that neither Mooney nor Dobyns could have imagined. On December 23, 2020, the journal Nature published a landmark study by Daniel M. Fernandes and an international team of researchers titled “A Genetic History of the Pre‑contact Caribbean.” Drawing on ancient DNA from 174 individuals across the region, the authors reconstructed the population history of the Caribbean with unprecedented precision. Their conclusion was startling: the pre‑contact population of Hispaniola was not in the hundreds of thousands, let alone the millions, but in the low tens of thousands—of the order of thirty thousand people in 1492.
The New York Times immediately grasped the significance of the finding, reporting that ancient DNA was “changing how we think about the Caribbean.” That is an understatement. The genomic evidence does not merely revise earlier estimates—it overturns them. It forces a fundamental rethinking of the demographic, social, and moral history of the first century of European colonization.
To appreciate the scale of this revision, it is necessary to revisit the high‑counter tradition. Borah and Cook, working in mid‑twentieth‑century Berkeley, argued that Mexico’s pre‑Hispanic population was no less than 25 million and that it did not recover until 1947—a demographic recovery time of more than four centuries, twice as long as Europe’s recovery from the Black Death. Dobyns went further still, proposing that the Indigenous population of the Americas had been almost unimaginably large before 1492.
These estimates were not merely academic. They reshaped the moral narrative of the Conquest. If tens of millions died, then the Spanish—and by extension, Europeans—were responsible for one of the greatest demographic catastrophes in human history. The high‑counter numbers fed directly into the modern revival of the Black Legend, the sixteenth‑century Protestant polemic that portrayed Spain as uniquely cruel, greedy, and genocidal.
Yet even before the genomic revolution, doubts had begun to accumulate. Archaeology, ethnohistory, and ecological studies increasingly suggested that the high‑counter figures were inflated. Angus Maddison, the pioneering macroeconomic historian, offered far more conservative estimates: 7.5 million for pre‑Hispanic Mexico, 2 million for what became the United States, and 250,000 for Canada—a total of roughly 9.75 million for all of North America.[i] These numbers aligned more closely with the early low counters than with the postwar high‑counter orthodoxy.
Still, the Caribbean remained a stubborn outlier. Hispaniola’s early collapse was so rapid and so complete that scholars struggled to reconstruct its pre‑contact population. The written sources were contradictory, the archaeological record fragmentary, and the political uses of the numbers—by Spaniards, Protestants, nationalists, and modern activists—made sober analysis difficult.
ii. Columbus, Las Casas, and the Rhetoric of Numbers
The earliest population estimates for Hispaniola came from Christopher Columbus and his brother Bartholomew, who placed the island’s population at 1.1 million. This figure was not the product of a census; it was a sales pitch. Columbus needed to impress investors and patrons in Europe, and a populous island implied wealth, tribute, and opportunity. The number was fiction, but it was useful fiction.
Columbus’s letter to Ferdinand and Isabella, 1493. Columbus’s report of a populous, wealthy island was crafted to impress patrons and investors, not to record demographic reality.
Bartolomé de las Casas, the Dominican friar who became the most famous defender of Indigenous rights, offered even larger numbers. Las Casas claimed that Hispaniola had held three to four million inhabitants before the arrival of the Spaniards. By the time he arrived on the island, he insisted, only a few tens of thousands remained. His Very Brief Relation of the Destruction of the Indies (1542) was an indictment of Spanish cruelty, and his population figures were part of his moral arsenal. To condemn the Spaniards, he needed the scale of the catastrophe to be immense.
Bartolomé de las Casas (1484-1566) 16th‑century portrait.
Las Casas lived on Hispaniola, but his population figures were no more empirical than his estimates for regions he never visited. He arrived after the initial demographic collapse had already begun, never saw the pre‑contact population, and relied on secondhand claims about what the island “must have” held. His arithmetic belonged to the genre of moral indictment, not demographic measurement. Even his contemporaries doubted his numbers. A census taken in 1540 counted only 250 surviving Indigenous people on Hispaniola. If the island had once held millions, the death rate would have been unprecedented in human history. If it had held tens of thousands, the catastrophe was still immense—but it was not the apocalypse Las Casas described.
The persistence of the high estimates is itself a historical phenomenon. They were sustained by the polemical power of the Black Legend, by Protestant and later nationalist uses of Las Casas, by the moral appeal of large numbers, and by the difficulty of reconstructing Caribbean demography from fragmentary evidence. The high‑counter paradigm endured not because the evidence supported it, but because its moral narrative was compelling. Scholars also tended to extrapolate from Mesoamerica, where populations truly were large. The result was a historiographical inertia that survived long after doubts had accumulated.
Willem Blaeu’s 1639 map of Hispaniola. A richly detailed Dutch engraving that captures the island’s geography long after the demographic collapse, offering a visual counterpoint to inflated early population claims.
iii. The Genomic Revolution
This is where the Fernandes study enters the story. Ancient DNA allows researchers to reconstruct population history directly from biological inheritance rather than from rhetorical or politically motivated sources. The genetic patterns on Hispaniola show a population that was small, tightly knit, and marked by unusually close relatedness across individuals separated by centuries—a hallmark of limited population size.
The genomic findings also align with the archaeological record. Settlement patterns on Hispaniola reveal small, dispersed villages rather than dense urban centers, and the island’s conuco horticulture—small, intensively managed garden plots—could not have supported populations in the hundreds of thousands. Ecological studies of the island’s interior point to similar constraints. The genomic evidence does not stand alone; it corroborates what archaeology and ecology have long suggested.
Using the study’s effective population size estimates, even the combined population of Hispaniola and Puerto Rico could not have exceeded roughly 80,000—and was likely far lower. The Caribbean, the study concluded, was populated by small, mobile, interconnected communities with low genetic diversity and high levels of kinship across islands. This is not the demographic profile of a densely settled region with hundreds of thousands of inhabitants. It is the profile of a small, fragile population.
The implications are profound. The genomic evidence shows that the pre‑contact population of Hispaniola was not 1 million. It was not 500,000. It was not even 250,000. It was in the low tens of thousands. This does not diminish the tragedy of what followed. A population of 30,000 reduced to 250 in less than fifty years is a catastrophe of staggering proportions. But it is a catastrophe of a different kind than the one imagined by Las Casas and repeated by generations of historians.
iv: Disease, Not Genocide
The genomic evidence also helps clarify the causes of the collapse. Borah’s most important insight was that disease, not Spanish sadism, was the primary killer. Smallpox, measles, influenza, and the hemorrhagic fevers known as cocolitzli or matlazáhuatl swept through populations with no prior exposure. The shock of conquest—war, famine, forced labor, and social disruption—made Indigenous communities even more vulnerable.
This pattern was not unique to the Caribbean. In central Mexico, the population may have fallen from 7.5 million in 1518 to 1 million in 1603. Elsewhere in North America, the decline was slower but still devastating. As Alfred W. Crosby observed, the diseases “did not rain down uniformly and all at once,” but their cumulative effect was comparable to the Black Death in fourteenth‑century Europe. The difference is that Europe recovered. Many Indigenous societies did not.
An illustration in the Florentine Codex, compiled between 1540 and 1585 by Fray Bernardino de Sahagún depicting the Nahua peoples suffering from smallpox during the conquest-era in central Mexico
v: A New Understanding of the Caribbean Catastrophe
What the genomic evidence forces us to recognize is that Hispaniola’s tragedy was not the destruction of a populous, flourishing civilization of millions. It was the near extinction of a small, tightly knit, vulnerable population whose social fabric was torn apart by disease, exploitation, and the shock of colonization.
Recognizing that Hispaniola held tens of thousands rather than millions does not diminish the tragedy. It reframes it. The Spaniards did not exterminate a populous civilization in the modern genocidal sense, but they presided over—and contributed to—a demographic collapse of extraordinary severity. The moral weight of the event lies not in inflated numbers but in the near extinction of a vulnerable world.
This reframing has several consequences. It undermines the numerical foundation of the Black Legend. Las Casas’s millions were rhetorical inventions, not demographic realities. It vindicates the early low counters and the empirical approach of Angus Maddison. Maddison’s estimates, long dismissed as conservative, now appear remarkably close to the genomic evidence. It clarifies the moral history of the Conquest. The Spaniards were not the industrial‑scale mass murderers of Las Casas’s imagination. But they presided over—and contributed to—a demographic collapse of extraordinary severity. And it restores agency to Indigenous peoples. Small populations are not insignificant populations. They are simply more vulnerable to shocks.
vi: The Myth of Millions
The myth of millions has shaped our understanding of the Caribbean for five centuries. It has distorted the moral narrative of the Conquest, inflated the scale of the catastrophe, and obscured the lived reality of the Indigenous peoples of Hispaniola. The genomic revolution allows us to see the past more clearly—not to exonerate the Spaniards, but to understand the tragedy in its true dimensions. The destruction of Hispaniola was not the annihilation of millions. It was the shattering of a small world. And that, in its own way, is no less devastating.
As genomic data accumulates across the Americas, longstanding demographic assumptions will require re‑evaluation. The “hemispheric holocaust” narrative will give way to a more precise, regionally differentiated understanding of Indigenous population history. In this sense, the genomic revolution does not minimize the scale of Indigenous suffering; it grounds it in evidence rather than rhetoric.
Kevin Jon Fernlund is a Professor Emeritus of History at the University of Missouri–St. Louis, a Fulbright Scholar, and a former Director of the Western History Association. He is also the author of A Big History of North America, from Montezuma to Monroe (University of Missouri Press, 2022).
[i] See Lawrence Goldman, ‘Angus Maddison, 1926-2010’, Oxford Dictionary of National Biography, https://doi.org/10.1093/ref:odnb/102985
