Lesson 10 · about 60 minutes
Living with Others
Why human beings are social by nature, what the common good is, the family and the state, rights and duties, and a final project that brings the whole course together.
By the end of this lesson you will be able to
- Explain why human beings are social by nature, not merely by agreement
- Define the common good and the place of the individual person within it
- Describe the family as the first society, and explain subsidiarity, justice and friendship
- Apply ideas from the whole course to a real-world question
Read first
- Social Philosophy — The family, the state, authority, rights, duties and the common good.
Start here: alone on an island
Imagine you were shipwrecked as a baby on a deserted island and somehow survived on your own. Could you become fully yourself?
You would never learn to speak, because language is learned from others. You’d have no one to teach you, love you, argue with you or be a friend to. Aristotle said that someone who could live entirely alone would have to be either a beast or a god. Human beings are neither. We are made to live with others.
Social by nature
Some modern thinkers have imagined that society began as a kind of contract: isolated individuals agreeing to live together for safety. Aristotle and Aquinas see it differently. Human beings are social by nature. We need others to be born, raised, educated, and to live well. Community isn’t a compromise we put up with; it is part of how we flourish.
The common good
Every community exists for a common good: the conditions of social life that allow everyone, together and individually, to flourish. Peace, justice, safety, education, a healthy culture and strong families are all part of it.
The common good isn’t simply “whatever the majority wants,” nor the total of everyone’s private wishes added up. And it isn’t opposed to the good of the individual person. Two errors are worth avoiding:
| Error | What it says | Why it fails |
|---|---|---|
| Individualism | Only my private good matters | It forgets that we flourish only together |
| Collectivism | Only the group matters; the person is a tool | It forgets the dignity of each person (Lesson 6) |
The Thomistic view holds both together: the common good serves persons, and persons serve the common good.
The family, the state and subsidiarity
The family is the first and most basic society. It is where we are born, loved, taught and formed in virtue. Larger communities, such as neighbourhoods, schools, parishes and the state, are built out of families and exist to support them.
Authority exists to serve the common good. A good ruler, parent or teacher uses authority for the good of those in their care, not for their own advantage.
This leads to the principle of subsidiarity: larger communities should not take over what smaller ones can do well themselves. The state shouldn’t do what families can do; a national body shouldn’t do what a local community can do. Higher authorities help and support; they don’t replace.
Rights and duties
You have rights: to life, to seek the truth, to worship God, to raise a family, to work. But every right comes with duties. My right to life gives you a duty not to harm me; your right to speak freely comes with a duty to speak truthfully and fairly. Rights and duties both flow from the same source: the natural law and the dignity of the person (Lesson 9).
Friendship
Aristotle thought friendship was so important that no one would choose to live without friends, even if they had every other good thing. He describes three kinds:
- Friendships of usefulness: we are friends because we help each other.
- Friendships of pleasure: we are friends because we enjoy each other’s company.
- Friendships of virtue: we are friends because each wants the good of the other for their own sake.
The first two are real but fragile: they end when the usefulness or fun runs out. The third is rare, lasting and the best. It needs good character on both sides, which is why virtue (Lesson 8) matters so much for our relationships.
Final project: bringing it together
Choose one of these questions:
- Should euthanasia be legal?
- Can social media friendships be true friendships?
- Could an artificial intelligence ever be a person?
- What do we owe people living in poverty?
Write a short answer (about one page), or record a three-minute talk, that uses at least three ideas from the course, including:
- a clear argument, set out so its premises and conclusion can be tested (Lesson 2),
- a claim about human nature (Lessons 4 and 6),
- a moral analysis drawing on happiness, virtue or the natural law (Lessons 7–9).
Then state the strongest objection to your answer and reply to it fairly. A good philosopher always takes the other side seriously.
Where to go from here
This course has given you a foundation: how to think clearly, what is real, who you are, and how to live well. Every one of these topics goes much deeper. The branches of catholicphilosophy.info are a good place to keep reading, starting with whichever lesson interested you most.
Read the texts
Read Aristotle, Politics I.2, Summa Theologica I-II, q.90, a.2 and Aristotle, Nicomachean Ethics VIII.3. As you read, ask:
- What does Aristotle mean when he says the city exists “by nature”?
- Why does Aquinas insist that every true law must be directed to the common good?
Primary texts
- Aristotle, Politics I.2 Man is by nature a political animal; someone who could live entirely alone would be either a beast or a god.
- St Thomas Aquinas, Summa Theologica I-II, q.90, a.2 Law is always directed to the common good.
- Aristotle, Nicomachean Ethics VIII.3 The three kinds of friendship - of usefulness, of pleasure, and of virtue.
Check your understanding
Choose an answer for each question, then check your score.
Think and discuss
Talk these over with your class or family, or write a short answer to each.
- Is the common good just the sum of what everyone wants? Why not?
- Why does Aristotle say that true friendship is only fully possible between good people?
- What duties come with the right to free speech?
- Why should decisions be made at the most local level that can handle them?
- Looking back over the whole course, which idea will matter most for your adult life, and why?
Key takeaway
We flourish together, not alone.
Homework: Complete the final project below, then reread the question you wrote down in Lesson 1 and write a paragraph answering it now.