Plato’s Theory of Forms

Plato’s theory of forms is perhaps the first complete philosophical idea in the Greek tradition. It is so fundamental to the activity of philosophy, that the entire subject might be summarized as “a series of alternatives to Plato’s theory of Forms.” We sketch out the development of this theory from its earliest presentations in dialogues like the Republic through Plato’s own reconsideration of the theory in Parmenides, to the late presentations of the theory in Sophist and Philebus. (B)