Slavery is one of the hardest questions in the inherited tradition because modern readers rightly begin from abolition. The critic then assumes a simple syllogism: if Islam regulated slavery rather than abolishing it at once, Islam morally failed. The judgement ignores the premodern universality of slavery, the nature of legal reform in revelation, and the strong emancipatory thrust that Islamic law introduced into a brutal world it did not invent.
The verse names the freeing of a slave as one of the most spiritually elevated acts a human being can perform. The Quran does not present manumission as morally neutral. It presents manumission as a positive religious duty, listed in the same passage with feeding the hungry and caring for the orphan as the works that constitute the steep moral path.
The world revelation entered
Slavery was global, entrenched, and economically embedded. No major civilisation had abolished it. Revelation therefore addressed a living institution tied to war, labour, debt, and social hierarchy. In such a world, law often works by restriction, moral redirection, and staged transformation, rather than by one declarative stroke whose social mechanisms do not yet exist.
What Islam did change
The Quran and Sunnah repeatedly opened doors to manumission, made freeing slaves an expiation for major wrongs, praised emancipation as righteousness, encouraged contractual self-purchase, prohibited many abuses, recognised the legal and spiritual humanity of the enslaved, and narrowed the lawful routes into bondage mainly to war captivity. This was morally significant reform in a world where human beings were often treated as pure property.
The Quran establishes the legal mechanism of mukātabah (the contract of self-purchase), through which a slave could buy their own freedom in instalments:
The verse imposes a positive duty on the slave-owner to grant the contract of self-purchase when sought, and goes further by instructing the broader community to assist the contracting slave from public funds. The legal mechanism is structural rather than decorative. It built into the institution of slavery itself the route by which the institution would be progressively dismantled, with the dismantling subsidised by the religious community.
The reform does not satisfy the modern abolitionist instinct, and Muslims should admit as much plainly. The moral direction of the law matters. Islam did not sacralise a caste ontology in which some people were born naturally slave. It treated slavery as an existing condition to be humanised, restricted, and eroded. Many jurists later carried forward the regulatory framework more strongly than the emancipatory impulse. That is a historical problem within Muslim civilisation, not proof that revelation was indifferent to human dignity.
The Prophetic standard on the treatment of slaves
The Prophet ﷺ established the standard for the treatment of slaves with a clarity that has shaped Islamic law for fourteen centuries:
The hadith reframes the slave as the master’s brother (akh), whose food, clothing, and labour limits are bound by the same standards the master applies to his own life. The relationship described is irreconcilable with the chattel slavery that defined most of human history. The hadith does not abolish slavery as an institution. It abolishes the moral logic that made chattel slavery possible: the treatment of the enslaved as property rather than as persons whose welfare is the master’s continuing religious responsibility.
The sexual-relations question
The most difficult part of the subject concerns concubinage. Modern moral revulsion is understandable. The institution has to be located in the legal world that already existed: war captivity, household incorporation, paternity rules, restrictions on prostitution, rights for umm al-walad (the slave who has borne her master a child, who could not be sold and who was automatically freed on the master’s death), and the pathway by which children born from such unions entered full free status. One may still judge the institution morally surpassed by abolition. One should avoid describing it with slogans borrowed from modern systems that operated by very different assumptions and abuses.
The relevant conclusion
The Islamic tradition does not read best as a timeless endorsement of bondage. It reads better as a revelation entering a slaveholding world and bending it toward emancipation, restraint, and recognition of shared humanity under God. In a world where abolition is possible and public welfare requires it, the moral trajectory is best honoured by abolition itself, rather than by nostalgic retrieval.
Tawḥīd strengthens the reading because it denies that mastery belongs absolutely to any human over another. God alone is Lord. Human beings are His servants and vicegerents. A legal order shaped by that truth may regulate historical damage on the way to justice; it need not celebrate the damage as an eternal ideal.
The principle of actionalism (that moral progress is the purpose of human existence) means that the directional movement matters. Islam entered a world where slavery was universal and began dismantling it through manumission incentives, legal protections, and the theological principle that all human beings are khalīfah (vicegerents of God, not property). The trajectory points toward abolition even where the historical implementation fell short.
The principle of actionalism holds that the moral trajectory matters. Islam did not abolish slavery in one stroke; it established the principles (the khalīfah’s dignity, the equality of all souls before God, the merit of manumission) that made abolition the logical conclusion of its own ethics. The question is whether Islam’s direction was toward greater human dignity. The evidence says yes, and the tradition’s own principles demand that the trajectory continue.
The trajectory argument (that Islam moved the needle dramatically from seventh-century norms in the direction of liberation) is strengthened by the principle of actionalism. The khalīfah’s moral vocation is not static. It unfolds in history.