Plato – The Allegory of the Cave
Plato’s Cave is a timeless lesson. Framed as a conversation between Socrates and Glaucon, Socrates describes the squalid state of a group of prisoners raised from birth in a cave, seeing only shadows on the walls.
One of the prisoners escapes, and after adjusting to the outside world, returns to tell the other prisoners of his experience.
This tale is designed to show how people are conditioned by their surroundings and will reject new information that undermines their world view.