The story of slavery in the Americas from 1492 to 1619 cannot be told without Christianity. European conquest was justified through religious rhetoric, evangelization framed systems of coerced labor, and clergy both defended and denounced slavery. From Columbus’s claim that Indigenous people would make “good servants” for the Christian monarchs to Dominican friars thundering in the pulpit that “Are they not men? Do they not have rational souls?,” Christianity shaped the moral and legal frameworks of early slavery. Catholicism was the dominant force in this period, but Protestant powers — English and Dutch — also began to grapple with the trade by the late sixteenth century. American YawpAlbertus Magnus College

This essay examines Christianity’s role across four dimensions: (1) theological justification of conquest and slavery, (2) the missionary mandate and Indigenous labor systems, (3) clerical critique and moral debate, and (4) Protestant entry into the Atlantic world before 1619.

1. Theological Justification of Conquest and Slavery

European monarchs claimed religious sanction for their expansion. The Doctrine of Discovery, articulated in papal bulls such as Inter caetera (1493), granted Spain claims to newly “discovered” lands west of a demarcation line, with evangelization of Indigenous peoples as part of the mandate. Christianity was not an incidental feature of colonization; it was integral to its legal and ideological framework. Doctrine of DiscoveryGilder Lehrman Institute

Columbus himself framed conquest in religious terms. In his 1492 journal he wrote: “They should be good servants… I believe that they would easily be made Christians.” American YawpHanover College History Department

Spanish monarchs also tied early Black slavery to Christianity. In 1501, Ferdinand and Isabella authorized the transport to the Indies of Christianized (ladino) Africans; subsequent licenses and orders in the first decades of the 1500s continued (and sometimes modified) this policy. (Early documents refer specifically to negros ladinos, i.e., Iberian-acculturated, baptized Africans.) Lowcountry Digital History InitiativeJSTORFirst Blacks

2. Christianity and Indigenous Labor Systems

The encomienda was framed as Christian stewardship—granting Spaniards rights to Indigenous labor in exchange for material support and instruction in the faith—even as practice often diverged into coercion and abuse. The Laws of Burgos (1512–13) codified evangelization obligations and sought (imperfectly) to regulate treatment under a Christian rubric. JSTORThe Library of CongressWikipedia

Catholic orders—Franciscans, Dominicans, Jesuits—founded missions across the Caribbean and mainland; the cross accompanied the sword, reinforcing spiritual and temporal domination. Jesuits became especially prominent in Brazil from 1549 under Manuel da Nóbrega and later José de Anchieta. (Their writings and later scholarship register internal tensions over Indigenous and African slavery.) Brown University LibraryWikipedia

Spanish scholastics argued over the legality of conquest and enslavement: Juan Ginés de Sepúlveda invoked Aristotle’s theory of “natural slavery,” while Francisco de Vitoria defended Indigenous rationality and natural rights. Christianity supplied the shared intellectual language for both positions. History on TrialWikipedia

3. Clerical Critique and Moral Debate

Not all Christians accepted slavery as just. In 1511, Dominican Antonio de Montesinos preached in Santo Domingo:

“Are they not men? Do they not have rational souls? Are you not bound to love them as you love yourselves?” Albertus Magnus CollegePBS

The sermon helped spur debates in Spain and influenced Bartolomé de las Casas, who renounced his encomienda and became a leading critic of colonial cruelty. In A Short Account of the Destruction of the Indies (1552), Las Casas condemned Spaniards who behaved “like ravening wild beasts.” Digital Public Library of America

Las Casas also illustrates ambivalence within Christian responses: early on he proposed substituting African labor for Indigenous labor, a view he later recanted as equally unjust. Bill of Rights Institute

By the mid-1500s, Jesuits ministered to Africans as well as Indigenous peoples in Portuguese America. (Contemporary letters and later histories record pastoral concern for the enslaved alongside Jesuit participation in colonial structures.) Brown University Library

4. Protestant Entry: England and the Netherlands

Though Catholic Spain and Portugal dominated the sixteenth century, Protestant powers intervened—shaped by confessional rivalry as well as profit. John Hawkins led English slaving voyages in the 1560s, seizing and selling Africans in Spanish America. His own accounts (via Hakluyt and later editions) note he “got into his possession… 300 Negroes, partly by the sword.” Saylor AcademyWikisource

On his second voyage he sailed with the Jesus of Lübeck, chartered with royal backing—an emblem of how Protestant England’s national ambitions intersected with the slave trade. Wikipedia

The Dutch soon raided Portuguese shipping and forts in Africa, foreshadowing their seventeenth-century rise in the trade. Wikipedia

Quantitative and Comparative Perspectives

By 1619, Africans in the Americas numbered in the hundreds of thousands. Modern datasets (e.g., SlaveVoyages) estimate roughly ~200–300k disembarkations across the Atlantic before 1600, with a pronounced upswing in the early 1600s. Brazil already took the largest share, followed by the Spanish Caribbean and Spanish mainland; English, Dutch, and French participation remained small before 1619. (Precise cutoffs vary by method; figures for individual regions before 1619 should be treated cautiously.) SlaveVoyages

Table 1. Africans Transported to the Americas by 1619 (pattern, not precise counts)

(Pattern summarized from SlaveVoyages and syntheses; regional tallies pre-1619 are debated.) SlaveVoyages

Christianity as Cultural Survival

For enslaved Africans, Christianity was not only imposed but also adapted. Africans blended Catholic rituals with African traditions in ways that later crystallized into named diasporic religions—Vodou in Haiti, Candomblé in Brazil, Santería in Cuba—while, already in the 16th–17th centuries, Black confraternities (cofradías/irmandades) provided sanctioned spaces for devotion, solidarity, and mutual aid. Encyclopedia BritannicaWikipedia+1Brill

Conclusion

From 1492 to 1619, Christianity shaped slavery in the Americas at every level. Papal bulls justified conquest; royal instructions authorized Christianized (ladino) Africans for transport; missionaries oversaw Indigenous labor; friars denounced atrocities; Jesuits ministered within colonial constraints; Protestants entered the trade amid confessional rivalry. Christianity was invoked both to defend slavery and to resist it.

By 1619, when Africans arrived in Virginia, the system of slavery was already deeply Christianized—embedded in Catholic theology, Spanish and Portuguese law, missionary practice, and even the Protestant ventures of Hawkins. Yet Christianity also nurtured critiques of slavery and offered enslaved peoples a language of resistance and hope. To understand slavery’s origins in the Americas, we must see it not only as an economic or political system but also as a religious one—born in an age when empire and Christianity were intertwined, and contested by the very faith that helped create it.

Bibliography

Justification & Law

Columbus, Christopher. The Diario of Christopher Columbus’s First Voyage to America, 1492–1493. Edited and translated by Oliver Dunn and James E. Kelley Jr. Norman: University of Oklahoma Press, 1989.

Davenport, Frances Gardiner, ed. European Treaties Bearing on the History of the United States and Its Dependencies to 1648. Washington, DC: Carnegie Institution of Washington, 1917. [Includes text of Inter caetera (1493) and related papal bulls.]

Ferdinand and Isabella. Royal decree on the transport of Christianized Africans (1501). In James Lockhart and Enrique Otte, eds., Letters and People of the Spanish Indies: Sixteenth Century. Cambridge: Cambridge University Press, 1976.

Sepúlveda, Juan Ginés de. Democrates Alter, sive de justis belli causis apud Indios (1544). In Lewis Hanke, ed., Aristotle and the American Indians: A Study in Race Prejudice in the “Modern World.” Bloomington: Indiana University Press, 1959.

Vitoria, Francisco de. Political Writings. Edited by Anthony Pagden and Jeremy Lawrance. Cambridge: Cambridge University Press, 1991.

Thornton, John. Africa and Africans in the Making of the Atlantic World, 1400–1800. 2nd ed. Cambridge: Cambridge University Press, 1998.

Indigenous Labor & Missions

Hanke, Lewis. The Spanish Struggle for Justice in the Conquest of America. Philadelphia: University of Pennsylvania Press, 1949.

Nóbrega, Manuel da. Cartas do Brasil (1549–1560). Edited by Serafim Leite. Coimbra: Universidade de Coimbra, 1955.

Anchieta, José de. Cartas, Informações, Fragmentos Históricos e Sermões. Edited by Serafim Leite. Coimbra: Universidade de Coimbra, 1933.

Wheat, David. Atlantic Africa and the Spanish Caribbean, 1570–1640. Chapel Hill: University of North Carolina Press, 2016.

Critics & Reformers

Las Casas, Bartolomé de. A Short Account of the Destruction of the Indies. 1552. Reprint. London: Penguin Classics, 1992.

Montesinos, Antonio de. Sermon of 1511, Santo Domingo. In Lewis Hanke, The Spanish Struggle for Justice in the Conquest of America. Philadelphia: University of Pennsylvania Press, 1949.

Berlin, Ira. Generations of Captivity: A History of African-American Slaves. Cambridge, MA: Harvard University Press, 2003.

Protestant Entry & the Atlantic Transition

Hawkins, John. The Hawkins Voyages. Edited by David Beers Quinn. London: Hakluyt Society, 1979.

Eltis, David, and David Richardson. Atlas of the Transatlantic Slave Trade. New Haven: Yale University Press, 2010.

Smallwood, Stephanie. Saltwater Slavery: A Middle Passage from Africa to American Diaspora. Cambridge, MA: Harvard University Press, 2007.