Comment: “Slavery is natural and beneficial both for the master and the slave.” (Aristotle) (1996)
In Politics Book I, chapters 3–7, Aristotle answers those who held that slavery exists by law only and is therefore unjust. He argues that some men are by nature free, and others slaves, and that for these latter slavery is both expedient and right. The doctrine fails on its own premises, yet matters as the model argument for naturalising hierarchy, one that caste and colonialism would later repeat.
The Doctrine
- Household instrument. The slave is a living possession, an instrument of action (I.4).
- Hierarchy in nature. Soul rules body; likewise, from the hour of their birth, some are marked out for subjection, others for rule (I.5).
- The natural slave is one who participates in rational principle enough to apprehend, but not to have, such a principle. I.13 adds that he has no deliberative faculty at all.
- Mutual benefit. The master gains leisure (scholē) for politics and philosophy; the slave gains direction by a reason he lacks. Where the relation is natural, master and slave are friends and have a common interest (I.6).
- Conventional slavery rejected. Enslaving war captives rests on force, not nature, a point he concedes to critics, while implying that non-Greeks are natural slaves.
Critique
- No test. Aristotle admits that nature wants to mark free and slave bodies but that the opposite often happens. Without a criterion, every actual slave is held on an unverified title.
- Self-contradiction. He tells masters to admonish slaves (I.13), recommends freedom as a reward (VII.10) and provided in his will for freeing slaves. Anyone who can be reasoned with or freed was never incapable of deliberation.
- Effect mistaken for cause. Jean-Jacques Rousseau (The Social Contract, 1762, I.2) said Aristotle was right; but he took the effect for the cause: slaves lose everything in their chains, even the wish to escape.
- Dialectic and class. In Georg Wilhelm Friedrich Hegel‘s master–slave dialectic (Phenomenology of Spirit, 1807), the bondsman reaches self-consciousness through labour and the master becomes dependent. For Karl Marx slavery was the ancient mode of production; on that reading Aristotle supplies its ideology.
- Its afterlife. At Valladolid (1550–51) Juan Ginés de Sepúlveda cited Aristotle to call Native Americans natural slaves, and Bartolomé de las Casas rejected the claim. Plantation slavery and the “civilising mission” repeated the pattern: incapacity alleged in the ruled, benefit claimed for them.
The Indian Anchor
B. R. Ambedkar (Annihilation of Caste, 1936) exposed the same move in caste, a division of labourers fixed by birth and presented as natural order. In the Constitution, Article 17 abolishes untouchability, Article 23 prohibits trafficking and forced labour, and the Bonded Labour System (Abolition) Act, 1976, gives Article 23 legal force. The problem persists: the ILO, Walk Free and IOM Global Estimates of Modern Slavery (2022) counted 50 million people in modern slavery in 2021, 28 million of them in forced labour.
Conclusion
The claim is false on both counts: no one is naturally incapable of deliberation, and bondage benefits only the master. What survives is Aristotle’s sound principle that rule must match the capacities of the ruled. Once every human being is recognised as capable of deliberation, that principle condemns slavery.