Imagine a man living in a large ceramic jar in the marketplace of Athens. He owns almost nothing. He begs for food, sleeps outside, and has been known to relieve himself in public, to eat in the street, and to insult powerful men to their faces without a second thought. He is not mad. In fact, he is considered one of the most philosophically serious people in the city. His name is Diogenes of Sinope, and he is the most famous representative of a school of thought called Cynicism. This deck is about him, and about the radical, provocative, and surprisingly compelling philosophy he embodied.

Cynicism began with a philosopher named Antisthenes, a student of Socrates, in the late fifth century BC. But it was Diogenes, born around 412 BC in the city of Sinope on the Black Sea coast, who turned Cynicism from a set of ideas into a way of life so extreme it became legendary. Diogenes arrived in Athens under a cloud. He and his father had been exiled from Sinope, possibly for defacing the local currency — literally stamping on coins to devalue them. When Diogenes consulted the oracle at Delphi about what he should do with his life, he received the instruction to 'deface the currency'. He took this as a metaphor. His life's work would be to deface the currency of conventional society — to expose its values as counterfeit.

So what did the Cynics actually believe? At the heart of Cynicism is a single, uncompromising claim: virtue is the only good. Not wealth, not fame, not pleasure, not social status. These things, which most people spend their lives chasing, are in the Cynic view not just unimportant — they are actively dangerous. They distract us from the only thing that truly matters, which is living a life of genuine virtue. And crucially, the Cynics believed that virtue does not require any of those things. A person can be virtuous in poverty, in obscurity, in discomfort. In fact, the Cynics suspected that wealth and comfort often make virtue harder, not easier, because they give us so much to lose.

The name 'Cynic' most likely comes from the Greek word for dog, and the Cynics embraced this association. Dogs, they pointed out, live simply and without shame. A dog does not worry about its reputation. It does not perform for an audience. It does not dress up or pretend. It simply lives according to its nature. This is exactly what the Cynics wanted to do. Their central concept was living 'in accordance with nature' — and by nature, they did not mean the natural world in a vague, romantic sense. They meant stripping away everything artificial, everything that society has layered on top of our basic human nature, and living as simply and honestly as possible.

What does it mean to live in accordance with nature? For the Cynics, human beings are rational animals. Our nature is to think, to reason, and to act virtuously. Everything else — the fine clothes, the elaborate social rituals, the pursuit of wealth and status, the desperate need for other people's approval — is convention. It is costume. It is, in Diogenes's phrase, defaced currency. The Cynics called these artificial social conventions 'nomos', and they set it against 'physis', which means nature. Their project was to tear away the nomos and get back to the physis. To live as a human animal, free from pretension, free from dependence on things you do not need.