Aristotle's Concept of Justice

Aristotle's justice was conservatist in nature. That's he carry forwarded the ideas of justice that existed earlier. His justice was just opposite to that of Plato's, i.e., revolutionary.

Aristotle identified three types of justices -

Distributive Justice - it deals with the allocation of honor and wealth. Legislators should be concerned with this justice. The basic principle of this justice is - treating equals equally and unequals unequally on the basis of prevailing customs and customary laws.
Retributive (or corrective) Justice - it deals with imposition of punishment and payment of damages. Involuntary loss sustained in transaction between individual members of the community would be fully compensated. Judges are concerned with this form of justice.
Commutative Justice - it deals with determination of the amount of one sort of goods and services to be rendered in return for another sort in voluntary transaction of buying and selling, or letting and hiring. Judges are concerned with this form of justice.