📘 TABLE OF CONTENTS
- Introduction
- What Aristotle Means by “Natural Slavery”
- Characteristics of a Natural Slave
- Why Aristotle Believed Slavery is Natural
- Types of Slavery According to Aristotle
- Master-Slave Relationship
- Economic and Political Role of Slavery in the Greek Polis
- Ethical Justification by Aristotle
- Aristotle’s Contradictions on Slavery
- Criticisms of Aristotle’s Theory
- Relevance in Modern Political Philosophy (UPSC Touchpoints)
- Short Summary
1. INTRODUCTION
Aristotle lived in 4th century BCE Greece, where slavery was a widely accepted institution.
Most households, farms, and city-states functioned with slave labor.
Instead of rejecting this institution, Aristotle tried to philosophically justify it, which has made his theory one of the most controversial in political thought.
He believed that some people are natural slaves—not because of force or birth, but because of their mental and moral characteristics.
2. WHAT ARISTOTLE MEANS BY “NATURAL SLAVERY”
Aristotle created a distinction between:
a) Natural Slavery – justified
b) Conventional/Legal Slavery – unjust
He says:
“He who can belong to another is by nature a slave.”
“A slave is a living tool.”
According to him, some individuals naturally lack:
- rational capacity
- deliberative thinking
- self-governance
Thus, such people should be ruled by others, for their own benefit.
In simple words:
Aristotle believed that some people are mentally and morally suited only to be followers, not leaders.
3. CHARACTERISTICS OF A “NATURAL SLAVE”
Aristotle describes natural slaves as people who:
- Lack rational foresight
They cannot plan ahead or make strategic choices. - Possess only physical strength
They can work but cannot direct their labor. - Have limited deliberative ability
They can understand commands but cannot originate them. - Depend on others for thinking
Their mind is “incomplete”. - Are better off under someone’s authority
Rule by a master improves their welfare.
Diagrammatically:
Natural Slave = Body > Mind
Natural Master = Mind > Body
He believed that the master–slave relationship is like:
- soul and body
- reason and passion
- human and animal
4. WHY ARISTOTLE BELIEVED SLAVERY IS NATURAL
Aristotle gives several reasons:
a. Hierarchy exists in nature
Just as:
- animals serve humans
- body serves the soul
Similarly, some humans “naturally” serve others.
b. Mutual benefit (in his view)
Master: provides guidance
Slave: provides labor
Both “benefit” — a key argument of Aristotle.
c. Capacity for reason determines status
Those who lack reason are “natural instruments”.
d. Slavery is essential for the good life
Citizens must have leisure to:
- think
- deliberate
- engage in politics
Slaves free the citizens from manual work.
Thus, for Aristotle, slavery sustains:
- democracy
- citizenship
- philosophy
- politics
5. TYPES OF SLAVERY ACCORDING TO ARISTOTLE
1. Natural Slavery (Justified)
People who lack rational faculties.
2. Legal or Conventional Slavery (Unjustified)
People enslaved due to:
- war
- conquest
- purchase
- birth
Aristotle admits these are wrong, because they are not based on nature but on force.
He openly criticizes enslaving:
- Greeks by Greeks
- capable, rational individuals
This creates contradictions in his philosophy.
6. MASTER–SLAVE RELATIONSHIP
Aristotle describes it as:
Natural & Necessary
The master uses reason; the slave uses the body.
Moral Superiority of Master
Master possesses reason and virtues.
Instrumental Role of Slave
Slave is a “living tool”.
Mutual Benefit
In Aristotle’s view, the slave gets:
- protection
- livelihood
- guidance
Master gets:
- labor
- economic productivity
7. ECONOMIC AND POLITICAL ROLE OF SLAVERY IN GREEK POLIS
Slavery was foundational to Greek society.
a. Economic
- agriculture
- mining
- household labor
- craftwork
b. Political
Citizens needed leisure to:
- vote
- debate
- serve in juries
- join assemblies
Slavery provided that leisure.
c. Cultural
Without slaves, Greeks believed philosophy and arts would not flourish.
Thus, Aristotle justified slavery as essential to the Greek model of citizenship.
8. ETHICAL JUSTIFICATION BY ARISTOTLE
Aristotle argues that:
- Slavery is not exploitation
- It is for the benefit of the slave
- Slave becomes “better” under a good master
He saw the master as a guardian, not merely an owner.
However, this justification is built on flawed assumptions about human nature.
9. ARISTOTLE’S CONTRADICTIONS
Aristotle’s theory suffers from internal conflicts:
- Claims natural hierarchy but admits difficulty in identifying natural slaves
→ How do we know who is a natural slave? - Says slavery is natural but criticizes many forms of slavery
→ If most slavery is unjust, how can slavery be natural? - Says every person has some capacity for reason
→ Contradicts idea of “mindless” humans. - His own students criticized slavery
→ The theory was controversial even in his time.
10. CRITICISMS OF ARISTOTLE’S THEORY
- Unscientific
No evidence that some humans are “natural slaves”. - Ethically flawed
Violates human dignity, consent, and autonomy. - Contradictory
Admits legal slavery is unjust but still defends natural slavery. - Culturally biased
Based on Greek superiority over “barbarians”. - Justifies inequality
Rejects idea of universal human equality. - Ignores human capacity for growth
People develop reason through education and society.
Modern philosophy and human rights theory completely reject Aristotle on slavery.
11. MODERN RELEVANCE (UPSC ORIENTED)
Aristotle’s theory helps in understanding:
1. Evolution of Human Rights
Shows how far humanity has progressed in rejecting inequalities.
2. Debates on Natural Inequality
Used in discussions about hierarchy, caste, class, and discrimination.
3. Critical Analysis in Ethics
His justification is an example of misuse of philosophical reasoning to support oppression.
4. Republican Theory of Citizenship
Leisure as a requirement for political life resurfaces in civic republicanism.
5. Colonialism Studies
European colonizers later misused similar logic to justify domination.
6. Contextual Reading in Political Thought
UPSC expects students to understand Aristotle in the context of Greek society, not through modern moral lenses.
12. SUMMARY (Easy & Exam-Friendly)
- Aristotle believed some people are “natural slaves”, lacking rational capacity.
- Such people, he claimed, benefit from being ruled by rational masters.
- Slavery is natural, ethical, and mutually beneficial — in his view.
- He distinguished between natural slavery (just) and legal slavery (unjust).
- His theory supported the Greek system where citizens had leisure for politics.
- The theory is heavily criticized today as unjust, elitist, unscientific, and immoral.
- Despite its flaws, Aristotle’s theory helps understand ancient society, hierarchy, and early political philosophy.