The status and power of the good in Plato's Republic

What is it for a judgement, action, or character state to be itself a good thing, so genuinely worth pursuing? Readers of Plato's Republic discover that that it is by standing in the right relation to the Form of the Good that other things are, or become, good. In her recent monograph, Plato's Sun-Like Good, Sarah Broadie inverts the standard interpretive strategy by focusing primarily on the role of the Good in dialectic, and drawing conclusions about its metaphysical status on that basis. In this paper, I argue that the metaphysically radical features of the Good on her reading - that it is undefinable and not an object of knowledge for the guardians - are ultimately undermined by her full account of the Form, in particular of the way that it endows 'the things known' with their reality, as well as relating to its participants as participand. I also argue that her preferred interpretation of the guardians' objects of knowledge in the sun-analogy as action-types is conceptually and textually problematic, and should be rejected in favour of her dispreferred - yet ultimately deeply insightful - interpretation of these objects as Forms that the Good makes known and fully real.