Plato’s Allegory of the Cave Explained

The word ‘allegory’ comes from the Latin ‘allegoria,’ meaning speaking to imply something else. An allegory represents a larger point about society or human nature through a simple story, in which different characters may represent real-life figures. Sometimes, situations in the story may echo stories from history or modern-day life without ever explicitly stating this connection.

Allegories are similar to metaphors in that both illustrate an idea by making a comparison to something else. However, allegories are complete stories with characters, while metaphors are brief figures of speech.

The Allegory of the Cave is a Socratic dialogue recorded by Greek philosopher Plato. Plato was a student of Socrates, and one of the few people to write down some of his many teachings, which were eventually compiled into their own books. The Republic is one such book, containing The Allegory of the Cave, a dialogue between Socrates and Plato’s brother Glaucon. As presented by Plato, Socrates’s allegory of the cave imagines a group of people chained together inside an underground cave as prisoners. Behind the prisoners there is a fire, and between the prisoners and the fire are moving puppets and real objects on a raised walkway with a low wall. However, the prisoners are unable to see anything behind them, as they have been chained and stuck looking in one direction—at the cave wall—their whole lives.

As they look at the wall before them, they believe the shadows of objects cast by the moving figures are real things—and the only things. Their visible world is their whole world. The narrative goes on to ponder about what would happen if one of the prisoners were forced to leave. What would they see? How would they adjust? Would they believe what they saw outside? What would happen to them if they returned to the cave? Would they be able to see the same things they saw before? The narrative assumes the freed prisoner would return and try to liberate their fellow prisoners, now knowing how much more of the world exists outside the cave. However, in its conclusion, Socrates and Glaucon agree that the other prisoners would likely kill those who try to free them, as they would not want to leave the safety and comfort of their known world.

Plato uses the cave as a symbolic representation of how human beings live in the world, contrasting reality versus our interpretation of it. These two ideas reflect the two worlds in the story: the world inside the cave, and the world outside. For the prisoners in the cave, the shadows on the wall created by firelight are all they know to be real. If one of the prisoners breaks free and witnesses the outside world, they will come to understand that as the true reality. However, when the freed prisoner returns to the darkness of the cave, their eyes will have now been blinded by the light of the sun, and their fellow prisoners still inside the cave will believe that it is the outside world that is harmful; to them, that truth is not worth seeking.

The allegory delves into the philosophical thought of truth, and how those with different experiences or backgrounds may perceive it. The shadows on the wall of the cave are constantly changing, so there is no stability or consistency offered for those who bear witness to them—only a false reality. They have no knowledge that the real world exists outside of their dark cave, or even that there is a real world other than their own. Meanwhile, the person who has left the cave will not be able to exist as they once did. In fact, they may even come to pity or feel superior to those who remain in the cave. The allegory essentially demonstrates the conflicts between knowledge and belief and what happens to a person once they’ve been enlightened. It is an examination on the nature of humanity, and fear of the unknown.

Plato’s cave allegory has influenced philosophy as well as media and filmmaking, whether directly or indirectly. References to Plato’s allegory of the cave appear in works such as:

• Fahrenheit 451 by Ray Bradbury (1953): In this famous dystopian novel, fireman Guy Montague burns books for a living, until a new acquaintance forces him to reconsider his values. Through literature, Montague discovers the outside world.
• Country of the Blind by H.G. Wells (1904): In this Plato-esque story, a man with sight stumbles into a land of the blind, where all the villagers lost their sight due to a disease. However, not only can they not see, but they also don’t believe anyone else can. The man fails to prove to the villagers that he can see, and in the end, he is unable to save them from an impending rock slide.
• The Matrix (1999): This popular film follows Neo (Keanu Reeves) as he discovers that the world he has been living in is actually a simulated reality. Neo decides to leave his comfortable existence and learn the truth.
• The Truman Show (1998): In this movie about a TV show, Truman Burbank (Jim Carrey) lives a “fake” life that is used purely for the entertainment of others. Slowly, he begins to chip away at the facade, even though everyone else around him refuses to admit he’s right.
• Room by Emma Donoghue (2010): Author Emma Donoghue has acknowledged the influence of the Socratic allegory in her novel, Room, which is told from the perspective of a young boy who has never left the room where he was born.

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