Imagine a thermometer. It doesn't try to change the temperature of the room; it simply reflects it. If the room gets cold, the mercury goes down. If it gets hot, the mercury rises.
In *Casablanca*, Captain Louis Renault (played by Claude Rains) is that thermometer. While Rick Blaine begins the film hiding behind a mask of cold neutrality, Renault represents a very different philosophical stance: **ethical opportunism**, or situational pragmatism. Unlike Rick's active avoidance of the world, Renault actively plays the game of the world, bending his morals to match whoever holds the power.
Understanding Renault’s philosophy helps us see that Rick’s moral awakening isn't just about escaping apathy—it is about rejecting a life of spineless survival.
## The Pragmatist vs. The Awakened Existentialist
Renault is a master of what French philosopher [Jean-Paul Sartre](https://en.wikipedia.org/wiki/Jean-Paul_Sartre) called **"bad faith"** (*mauvaise foi*), but in a much more playful, conscious way than Rick. In his landmark book [Being and Nothingness](https://en.wikipedia.org/wiki/Being_and_Nothingness), Sartre describes people who play a role to escape the terrifying freedom of making genuine moral choices. Renault has turned this role-play into an art form.
When asked about his politics, Renault famously declares:
> "I have no conviction, if that's what you mean. I blow with the wind, and the prevailing wind happens to be from Vichy."
> — Captain Renault, *Casablanca*
While Rick’s initial stance is **nihilism** (believing nothing matters), Renault’s stance is **moral relativism** (believing that right and wrong depend entirely on your circumstances). Renault does not hate the Nazis, nor does he love them; he simply adapts to them to maintain his comfortable lifestyle, his wine, and his gambling.
## The Game Theory of Survival
To understand the contrast between Rick and Renault, we can look to modern **game theory**—the study of how people make decisions based on the actions of others.
1. **Renault's Strategy (The "Tit-for-Tat" Mimic):** Renault plays a survival game. He cooperates with the dominant force (the German Major Strasser) because the cost of resistance is too high. He treats morality as a luxury he cannot afford.
2. **Rick's Strategy (The Defector turned Martyr):** Rick moves from "defecting" (not playing with anyone) to making a high-stakes sacrifice. When Rick helps Victor Laszlo, he makes a choice that makes no sense in a game of pure survival. It is an act of pure, irrational courage.
This contrast is beautifully highlighted by the famous scene where Renault closes down Rick's café, claiming he is "shocked, shocked to find that gambling is going on in here!" right before a croupier hands him his winnings. Renault knows he is a hypocrite, but to him, hypocrisy is the oil that keeps the machine of survival running.
## The Infection of Virtue
The ultimate twist in *Casablanca* is not just Rick’s awakening, but how Rick’s choice acts as a moral contagion that infects Renault.
When Rick shoots Major Strasser to let Ilsa and Victor escape, Renault faces a defining choice. He can arrest Rick and secure his standing with the Nazi regime, or he can cover for him. By telling his deputies to "assemble the usual suspects," Renault throws away his thermometer. He chooses a side.
This transition is what the philosopher [William James](https://en.wikipedia.org/wiki/William_James) called a "vital option" in his essay [The Will to Believe](https://en.wikipedia.org/wiki/The_Will_to_Believe). Renault realizes that some truths—like friendship, patriotism, and human decency—cannot be arrived at by waiting to see who wins. You have to commit to them first to make them real.
When Renault drops the bottle of Vichy water into the trash at the end of the film, he isn't just discarding a drink; he is discarding his philosophy of opportunism. He joins Rick in the fog, stepping out of the comfortable theater of "bad faith" and into the messy, dangerous world of real existential freedom.