In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

Karl Popper claimed that this work undermines the "Open Society" in a work that details the "Spell" of its author. Its first section is comprised of Thrasymachus's critiques. Glaucon uses the story of the ring of Gyges in this work to illustrate the fact that man is inherently unjust. It contains the story of a group of shackled prisoners who see shadows against a wall. This work explains the Theory of the Forms with the Allegory of the Cave. For 10 points, name this Platonic dialogue, which also contains Socrates' description of an ideal state ruled by philosopher-kings.
Social Science