Glaucon's demand to be shown the inherent choiceworthiness of justice exposes the limits of dialectical argument. Acknowledging these limits, Socrates proposes that his interlocutors join him in an alternative activity, making a city in speech. This model city proves to be “entirely opposite” to existing cities, above all (as Socrates observes) because it restricts the practice of dialectical argument to those who first demonstrate a capacity for synopsis, that is, for seeing things as a whole. Socrates holds that one must be able to see things as a whole in order to benefit from the use of dialectic. I interpret the political institutions of Socrates' model city accordingly, as being instrumental to the practice of dialectic. Hence, I reject the prevalent readings of the Republic, which present these institutions either as a blueprint for public policy or as a parody of political idealism. Instead, I suggest that the interlocutors' discussion of censorship, the noble lie, and communism is propaedeutic, fostering the synoptic capacity necessary to benefit from the practice of dialectic, including dialectic aimed at revealing the choiceworthiness of justice.