September 30, 2026

Paul, Philemon, and the Problem of Christian Equality

Paul’s Letter to Philemon is only twenty-five verses long, but it raises one of the most difficult questions about early Christianity: if Paul believed that enslaved people were brothers and sisters in Christ, why did he not simply tell Christian slaveholders to free them?

The question becomes particularly striking in the case of Onesimus. Paul describes him as someone who has become extremely important to him and asks Philemon to receive him “no longer as a slave but more than a slave, a beloved brother” (Philemon 16). Yet Paul never explicitly says: “Free Onesimus.”

For modern readers, that can seem like a contradiction. If slavery is fundamentally incompatible with Christian equality, why does Paul not condemn the institution itself?

The answer is not found in a hidden abolitionist statement. Nor does the letter straightforwardly endorse slavery. Instead, Philemon shows Paul attempting to reshape the relationship between master and enslaved person from within the social structures of the Roman world.

What exactly happened to Onesimus?

The first difficulty is that we do not actually know.

The traditional interpretation is that Onesimus was an enslaved man who ran away from Philemon and eventually encountered Paul while Paul was imprisoned. Paul then sent him back with the letter, asking Philemon to receive him kindly.

That interpretation is plausible and has been enormously influential. But the letter itself never explicitly calls Onesimus a runaway. Nor does it clearly explain what happened between Onesimus and Philemon before he came into contact with Paul.

The traditional reconstruction partly depends on Paul’s statement that Onesimus was formerly “useless” but had now become “useful” (Philemon 11), together with Paul’s reference to something Onesimus may owe Philemon. These details can fit a runaway-slave scenario, but they do not prove it. Other scholarly reconstructions have proposed different explanations for how Onesimus came to be with Paul, including the possibility that he was sent to Paul rather than having fled from his master.

That uncertainty matters. It means we should be careful about turning the traditional story into historical fact.

What is clear is that Onesimus was an enslaved person connected with Philemon and that Paul was asking Philemon to change how he regarded him.

Paul does not abolish slavery

The central problem remains.

Paul does not tell Philemon that Christians cannot own enslaved people. He does not announce that slavery is incompatible with the gospel. He does not propose a general emancipation of Christian slaves.

Instead, he makes a personal appeal.

Paul reminds Philemon of their shared Christian relationship and of the fact that he could command him as an apostle but prefers to appeal “on the basis of love” (Philemon 8–9). He describes Onesimus as his own child and as someone whose presence has become valuable to him. He then asks Philemon to receive Onesimus as he would receive Paul himself.

Paul describes Onesimus as a doulos, a term that commonly denotes an enslaved person. In Philemon 16, the context makes clear that Paul is contrasting Onesimus’s existing status as a doulos with the new relationship he wants Philemon to recognize: Onesimus is to be received not merely as a slave, but as an adelphos, a brother. In the Roman world, slavery involved legally and socially enforced relations of dependence, although the actual conditions of enslaved people varied considerably.

Against this background, Paul’s request that Philemon receive Onesimus as an adelphos, a “brother,” becomes significant. Paul is not merely asking Philemon to be nicer to a servant. He is asking him to recognize an enslaved person as a fellow member of the Christian family.

Whatever precisely Paul expected Philemon to do, this is a remarkable change in the relationship Paul is seeking. Onesimus is still described in terms of his existing social status, but Paul insists that this status cannot define his relationship with Philemon within the Christian community.

That, however, is not the same thing as abolishing slavery.

Was Paul secretly asking Philemon to free him?

Possibly.

Paul ends the letter by saying that he is confident Philemon will do “even more than I say” (Philemon 21). Some interpreters have understood this as an indirect request for manumission. Paul may have deliberately avoided spelling out the request because doing so would have undermined the rhetorical strategy of the letter.

But this remains an interpretation.

The letter never uses an unambiguous command such as “set Onesimus free.” Even the exact practical outcome Paul expected is debated. Some scholars have argued that Paul wanted Onesimus released from his obligations so that he could remain with Paul and serve the Christian movement. Others have interpreted the letter within the more conventional framework of a slave returning to his master’s household.

The ambiguity is therefore part of the historical evidence rather than something that needs to be solved away.

Why appeal to love instead of command?

One explanation lies in the way Paul approaches authority.

Paul explicitly says that he could command Philemon but chooses not to. That does not mean that the request is weak. Quite the opposite. The letter is carefully constructed to make refusal difficult.

Paul writes not only to Philemon but also to Apphia, Archippus, and the church that meets in Philemon’s house. The letter therefore has a communal dimension. Philemon’s response to Onesimus is not simply a private matter between two individuals.

Paul also reminds Philemon that he owes Paul something himself: “you owe me even your own self” (Philemon 19). He offers to repay whatever Onesimus owes. And he repeatedly emphasizes their shared Christian identity.

The result is a letter full of social and rhetorical pressure without an explicit legal command.

John M. G. Barclay has emphasized the dilemma created by Philemon: Paul’s Christian theology could transform the relationship between slave and master, yet the letter does not explicitly reject slave ownership itself. The result is a form of Christian egalitarianism that exists within, rather than clearly outside, the social structures of the Roman world.

The important point is that persuasion should not automatically be equated with abolitionism. Paul is trying to transform a particular relationship; the letter does not explicitly propose the destruction of the institution that created that relationship.

Christianity and the Roman social order

This becomes easier to understand when Philemon is placed beside Paul’s other undisputed letters.

Paul does not normally present the Christian movement as a program for reconstructing Roman society. His letters address communities living within existing political, economic and household structures.

Paul’s concern in Philemon is not the restructuring of the Roman economy. His immediate concern is the relationship between members of the Christian community. The ekklesia—the assembly or congregation meeting in Philemon’s household—is part of the audience for the letter. This makes the treatment of Onesimus a communal Christian question, not simply a private dispute between an enslaved man and his owner.

In 1 Corinthians 7, for example, Paul discusses enslaved believers alongside other social statuses. He tells believers not to be overly concerned about the social condition in which they were called, although the precise meaning of his statement about obtaining freedom in verse 21 is disputed. Some translations understand Paul to encourage an enslaved person to take an opportunity for freedom, while others interpret the verse differently.

The passage therefore reflects an ethic concerned primarily with how Christians should live within their present circumstances rather than with a political campaign to dismantle slavery.

This does not mean that Paul regarded slavery as morally ideal. It means that the surviving Pauline letters do not contain a program for abolishing the institution.

That distinction is important.

Equality in Christ was not the same thing as social equality

Paul could make remarkably egalitarian theological claims.

In Galatians 3:28 he writes that “there is neither Jew nor Greek, slave nor free, male and female; for you are all one in Christ Jesus.”

Within the Christian community, distinctions of status could therefore be radically relativized.

But theological equality did not automatically eliminate social hierarchy.

A person could be a slave in Roman society and simultaneously be regarded as a full member of the Christian community. That created a tension that Christianity could live with without immediately resolving.

Philemon illustrates precisely that tension.

Paul asks Philemon to treat Onesimus as a brother. He does not explicitly tell Philemon that he can no longer be his owner.

From a modern perspective, that can look profoundly inadequate. Historically, however, it is important not to turn that observation into a claim about what Paul “really meant.” The evidence allows us to say what Paul wrote much more confidently than we can say what his ultimate social program would have been.

Did Paul expect slavery to disappear eventually?

Paul’s eschatological expectations are certainly relevant.

Paul believed that the present age was approaching its decisive transformation through Christ. This helps explain why he could tell Christians not to become excessively preoccupied with changing their social status. In 1 Corinthians 7, he repeatedly emphasizes living faithfully in the circumstances in which believers currently find themselves.

But eschatology should not be used as a complete explanation for Paul’s attitude toward slavery.

Paul’s letters reveal a more complicated combination of factors: expectation of the coming age, concern for the unity of Christian communities, a radical redefinition of relationships between believers, and an unwillingness—or perhaps inability—to formulate a comprehensive program of social revolution.

The evidence does not allow us to reduce all of this to “Paul thought the world was ending soon, so abolition was unnecessary.”

The uncomfortable historical conclusion

So why didn’t Paul abolish slavery?

The most historically cautious answer is that he did not attempt to abolish slavery as an institution.

Instead, he addressed what he could see immediately in front of him: the relationship between Philemon and Onesimus.

Within that relationship, Paul made a striking appeal. Onesimus was not to be treated merely according to his legal and social status as an enslaved person. He was to be received as a “beloved brother.” Paul used Christian kinship, mutual obligation, and his considerable social and rhetorical influence to press Philemon toward a different relationship.

Whether Paul expected outright manumission remains uncertain.

And that distinction matters because later Christian readers sometimes turned Philemon into something it does not straightforwardly say. Abolitionist interpreters could see in Paul’s language about brotherhood the seeds of a radical critique of slavery. Pro-slavery interpreters, by contrast, could point to the absence of an explicit prohibition and argue that Christianity permitted slave ownership.

Neither interpretation should simply be projected back onto the text as though the letter itself settles the modern debate.

The uncomfortable fact is that Paul could radically redefine the relationship between an enslaved person and a master without explicitly rejecting the institution of slavery itself.

That is not necessarily evidence that Paul was secretly an abolitionist. Nor does it mean that he straightforwardly endorsed slavery.

It shows something more historically interesting: Paul’s theology could undermine the social logic of slavery without producing an explicit program for its abolition.

Philemon therefore leaves us with a tension that the text itself never completely resolves. An enslaved person can become a beloved brother. A master can be asked to receive him as he would receive Paul. The existing social hierarchy is not explicitly abolished, but Paul’s language places significant pressure on how that hierarchy can function within the Christian community.

But the institution itself remains unnamed as a problem to be abolished.

And that may be precisely why Philemon has remained such a difficult letter for Christian readers.

Paul, Philemon, Slavery