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Allegory of the Cave by Plato. From The Republic By Plato...... The Allegory of the Cave, or Plato's Cave, was presented by the Greek philosopher Plato in his work Republic to compare "the effect of education and the lack of it on our nature." It is written as a dialogue between Plato's brother Glaucon and his mentor Socrates, narrated by the latter. The allegory is presented after the analogy of the sun and the analogy of the divided line. All three are characterized in relation to dialectic at the end of Books VII and VIII...... Plato begins by having Socrates ask Glaucon to imagine a cave where people have been imprisoned from birth. These prisoners are chained so that their legs and necks are fixed, forcing them to gaze at the wall in front of them and not look around at the cave, each other, or themselves. Behind the prisoners is a fire, and between the fire and the prisoners is a raised walkway with a low wall, behind which people walk carrying objects or puppets "of men and other living things." The people walk behind the wall so their bodies do not cast shadows for the prisoners to see, but the objects they carry do ("just as puppet showmen have screens in front of them at which they work their puppets." The prisoners cannot see any of what is happening behind them, they are only able to see the shadows cast upon the cave wall in front of them. The sounds of the people talking echo off the walls, and the prisoners believe these sounds come from the shadows...... Socrates suggests that the shadows are reality for the prisoners because they have never seen anything else; they do not realize that what they see are shadows of objects in front of a fire, much less that these objects are inspired by real things outside the cave.