The Evolution of Christian Theology on Slavery in the Age of Expansion |
For much of Christian history, theology placed limits on slavery. In late antiquity and the medieval period, the prevailing teaching was that while it was permissible to enslave non-Christians — pagans, Muslims, or “heathens” — it was forbidden to enslave fellow Christians. This principle rested on the belief that baptism created spiritual equality, binding believers together as the body of Christ. To enslave another Christian was seen as a betrayal of that shared identity.
As a result, when most of Europe converted to Christianity during the Middle Ages, slavery declined within Europe itself. It was replaced largely by serfdom, which, though oppressive, allowed peasants certain rights and kept them distinct from slaves captured in warfare.
But this theological framework was soon challenged. Beginning in the fifteenth century, European expansion into Africa and the Americas created new demands for labor, especially in the plantation economies of the New World. Here, the older rule — “Christians cannot enslave Christians” — became an obstacle. Once Africans began to convert to Christianity, how could their continued enslavement be justified? The answer lay in a series of theological shifts that subordinated principle to profit.
1. Colonial Expansion and the Problem of African Slavery
When Europeans established colonies in the Americas and began trading along Africa’s coasts, the economic stakes rose dramatically. Sugar, tobacco, rice, and eventually cotton plantations required immense amounts of labor. Indigenous populations had been decimated by disease and warfare, and indentured European laborers were too few and too temporary.
Initially, Africans were targeted because they were not Christians, fitting the older model of permissible enslavement. But as missionaries converted Africans — and as African rulers like those of Kongo embraced Catholicism — the theological dilemma sharpened. Under traditional doctrine, these new Christians should not have been enslaved. Yet freeing them threatened the very foundation of the plantation system.
To resolve this contradiction, Christian theology itself was reinterpreted and reshaped.
2. Doctrinal Shifts: Redefining Who Could Be Enslaved
Questioning the Validity of African Christianity
European missionaries often claimed that African conversions were “superficial” or insincere. Even when Africans were baptized and practiced Catholic or Protestant rituals, their Christianity was dismissed as second-class. This allowed Europeans to argue that Africans were not “truly” Christian and thus still eligible for enslavement.
Separating the Soul from the Body
Another innovation was the idea that baptism saved the soul but did not change the body’s social condition. Enslaved Africans could be baptized, but this did not bring freedom. Instead, baptism was framed as a way to secure eternal salvation while leaving their earthly status untouched. Christianity thus became a way to “comfort” the enslaved without challenging slavery itself.
Reinterpreting Biblical Texts
Scripture was also re-read to align with economic necessity.
The “Curse of Ham” (Genesis 9:25–27) was interpreted to mean that Ham’s descendants — imagined as Africans — were divinely destined for servitude.
The “Curse of Ham” (Genesis 9:25–27) was interpreted to mean that Ham’s descendants — imagined as Africans — were divinely destined for servitude.
The Apostle Paul’s injunctions to slaves — “Slaves, obey your earthly masters” (Ephesians 6:5; Colossians 3:22) — were emphasized as proof that slavery had divine sanction.In this way, the Bible was wielded not to liberate but to justify bondage.
The Apostle Paul’s injunctions to slaves — “Slaves, obey your earthly masters” (Ephesians 6:5; Colossians 3:22) — were emphasized as proof that slavery had divine sanction.In this way, the Bible was wielded not to liberate but to justify bondage.
Creating a Permanent Racial Distinction
Perhaps the most consequential shift was making slavery hereditary and racialized. Europeans distinguished between:
Indentured servants, mostly poor Europeans, whose service was harsh but temporary (four to seven years), after which they gained freedom.
Indentured servants, mostly poor Europeans, whose service was harsh but temporary (four to seven years), after which they gained freedom.
African slaves, whose bondage was permanent, inheritable, and tied to skin color.
African slaves, whose bondage was permanent, inheritable, and tied to skin color.
This definitional split — temporary servitude for whites versus perpetual slavery for Africans — hardened slavery into a racial caste system. Even if Africans converted, their children remained enslaved.
3. Convenience Over Principle
These changes reveal that Christian theology adapted out of convenience and profit rather than principle.
The original teaching — no enslaving fellow Christians — would have undermined plantation slavery.
The original teaching — no enslaving fellow Christians — would have undermined plantation slavery.
To preserve profits, theology was adjusted so that conversion did not bring freedom, African Christianity was discounted, and biblical texts were reinterpreted to fit economic needs.
To preserve profits, theology was adjusted so that conversion did not bring freedom, African Christianity was discounted, and biblical texts were reinterpreted to fit economic needs.
Missionaries, priests, and theologians often went along with these shifts because their work was tied to colonial powers. There were exceptions — such as some Quakers in the seventeenth and eighteenth centuries or Catholic critics in certain orders — but they were in the minority.
4. The Lasting Impact
The theological compromises of the fifteenth and sixteenth centuries had long-lasting consequences:
They entrenched the association of Blackness with slavery, severing the older link between religion and enslavement.
They entrenched the association of Blackness with slavery, severing the older link between religion and enslavement.
They corrupted Christianity’s universal claims by subordinating faith to racial and economic categories.
They corrupted Christianity’s universal claims by subordinating faith to racial and economic categories.
They gave moral cover to an economic system that otherwise would have seemed blatantly un-Christian.
They gave moral cover to an economic system that otherwise would have seemed blatantly un-Christian.
By redefining slavery as racial, permanent, and inheritable, European Christians built a theological edifice that justified centuries of exploitation.
The evolution of Christian theology on slavery in the age of European expansion demonstrates how faith can be reshaped by economic convenience. In late antiquity and the medieval period, Christians taught that enslaving fellow believers was forbidden. But in the 1400s and 1500s, as Africa and the Americas became central to Europe’s new global economy, theology bent to profit.
Conversion no longer brought freedom. Africans’ Christianity was doubted or devalued. Biblical texts were twisted to sanction bondage. And slavery itself was redefined: indentured servitude became temporary and “white,” while African slavery became permanent and racial.
This evolution not only justified the transatlantic slave trade but also left a lasting theological and cultural legacy. It entrenched racism, undermined Christianity’s universal claims, and offered moral cover to a system of exploitation that reshaped the modern world.