What Does Aristotle Say About Friendship?

What Is the Question?

The question asks for Aristotle's account of friendship, but the account is an argument, not just a description. Aristotle wants to explain what friendship is, why it matters, and what the best kind is. He does this in Books VIII and IX of the Nicomachean Ethics, and his analysis has shaped two thousand years of discussion. The question is therefore also a question about how to live: if friendship is as important as Aristotle says, then the quality of one's friendships is a measure of the quality of one's life.

Aristotle's starting point is that friendship is a virtue, or involves virtue, and is most necessary for life. He observes that no one would choose to live without friends even if they had all other goods, and that the young and the old, the rich and the poor, all need friends.

Historical Background

Aristotle inherited the Greek conception of philia, a term broader than modern friendship, covering family, fellow citizens, and business partners as well as friends. His achievement was to sort this broad phenomenon by the ground of the relationship. The Greeks took friendship seriously as a political and ethical topic, and Aristotle's treatment is the most systematic in the ancient world, influencing the Stoics, Cicero's On Friendship, and the entire later tradition of virtue ethics.

The key move is the distinction of three kinds of friendship by their ground or reason. The ground is what each party loves in the other: the useful, the pleasant, or the good. Because people love different things, the friendships built on these grounds differ in stability and value.

Key Arguments

The first argument is the threefold distinction. Friendship of utility is grounded in what each can do for the other; it dissolves when the benefit ends. Friendship of pleasure is grounded in the enjoyment the other provides; it dissolves when the pleasure fades. Friendship of virtue is grounded in mutual recognition of good character, wishing the other's good for their own sake; it lasts because its ground, character, is stable. Aristotle calls the first two incomplete or incidental friendships, and only the third complete.

The second argument is that complete friendship requires equality, time, and shared life. Aristotle insists that the friendship of virtue is rare, because it requires both parties to be good, to know each other well, and to share enough activity to sustain mutual trust. It cannot be formed quickly; it is built over time, like character itself. This is why he says that the wish for friendship is quick but the reality is not: friendship ripens only with shared life and shared experience.

The third argument is that friendship is necessary for eudaimonia. Aristotle's ethics identifies flourishing with virtuous activity, and he argues that friendship is a constituent of flourishing, not merely a means to it. Humans are naturally social, he claims, and the friend is another self, whose good is entangled with one's own. The person who has everything but no friends is missing something essential, and the good life is lived together with friends who share in activity and virtue.

Contemporary Relevance

Aristotle's account is the most cited philosophical source in the modern literature on friendship, and its distinctions remain the default framework. The contemporary relevance is practical. In a world of social media "friends" counted by the thousand, Aristotle's insistence that complete friendship is rare, slow, and grounded in character is a corrective. It tells us to measure friendship by depth, not number, and to invest in the few relationships that can actually become complete.

His account also answers a modern confusion: the expectation that friendship be effortless. Aristotle's complete friendship requires time, shared activity, mutual accountability, and the gradual disclosure of character. It is work, and the work is part of the value. The person who treats friendship as a series of pleasant encounters is, on Aristotle's terms, stuck at the level of pleasure friendship, which dissolves as soon as the pleasure does. The remedy is to practice the conditions of the complete friendship: be worthy of friendship by cultivating virtue, and invest in the shared life that friendship requires.

Sources

• Stanford Encyclopedia of Philosophy, "Friendship" — https://plato.stanford.edu/entries/friendship/
• Stanford Encyclopedia of Philosophy, "Aristotle's Ethics" — https://plato.stanford.edu/entries/aristotle-ethics/
• Stanford Encyclopedia of Philosophy, "Virtue Ethics" — https://plato.stanford.edu/entries/ethics-virtue/
• Aristotle, Nicomachean Ethics, trans. Terence Irwin (Hackett, 2019), Books VIII-IX.

Related Topics

• What Is Friendship? — the concept mapped.
• What Is Philia? — the Greek concept explained.
• How to Build Friendship — the practice.
• Virtue Ethics — the ethical framework.
• Eudaimonia — flourishing as the goal.