According to Socrates there are two parts of the justice one is related with society and the other one is related with individual part. But even though he says this he seems to think that this ought to be the case for different reasons.
Reeve, C. Nor does it mean that we might not ordinarily consider the soul of a just human being to be well ordered and the soul of an unjust human being poorly ordered cf. But the answer to the question of justice versus injustice presupposes the answer to the prior question of what justice is.
The Three-Part Tripartite Soul Socrates suggests that something separate from thirst holds the person back, and that this is something calculating and rational. Socrates proceeds to argue that these arrangements will ensure that unity spreads throughout the city ad. This is a good quality. After that, justice will be left over, so they'll know where and what it is.
Socrates explains the multiples by which people are punished and rewarded a-b. But what question in particular about justice is it our aim to answer?