Socrates

What is justice in the city according to Plato?

In the passages provided, Plato (through Socrates) does **not yet give his own positive definition of justice in the city**; instead, he stages rival accounts that set up the inquiry. In Book II, Glaucon reports a conventional view: justice in the city arises as a **social contract**, a compromise where citizens agree to laws so that no one does or suffers injustice; justice is thus treated as a **lesser evil**, valued instrumentally for security rather than as a good in itself [1]. This account frames justice in outcome-based terms (avoiding harm), not as a virtue of civic order, and it is explicitly presented as what “they say,” not as Socrates’ view [1]. In Book I, Thrasymachus advances a more cynical political thesis: justice in cities is simply **the advantage of the stronger**, meaning whatever serves the ruling power; on this view, injustice—especially tyranny—is more profitable and powerful than justice [3]. Again, this is a character’s claim that Socrates contests rather than endorses [3]. Book IV in the provided excerpt marks the **methodological turn** toward finding justice in the city once it has been “made habitable,” but it **does not state what justice is**; it only announces the search and presumes justice is discoverable as a feature of the city’s organization [2]. Therefore, based strictly on these sources, the evidence for Plato’s own account of justice in the city is **limited**: we can say that Plato contrasts instrumental and power-based accounts of civic justice [1][3] and signals that justice will be identified by examining the city’s structure [2], but the substantive definition itself is not yet given here. The evaluative takeaway is that, in these passages, “justice in the city” functions primarily as a **problem to be defined against rival views**, not as a settled doctrine.