Justice is often described as treating people equally. Yet equal treatment does not always account for unequal circumstances. A fair society must ask not only whether rules are applied consistently, but whether people have a meaningful opportunity to participate and flourish.

This distinction is sometimes framed as equality versus equity. Equality gives everyone the same rule or resource. Equity asks whether that rule or resource is adequate to the situation at hand. Neither principle can stand alone: unequal treatment needs a compelling justification, while identical treatment can preserve an avoidable disadvantage.

The common good offers a further test. Institutions should protect each person’s dignity while sustaining the conditions that allow a community to thrive. That standard does not settle every dispute, but it gives us a shared question: can those affected reasonably understand the arrangement as fair?

Justice therefore requires both general principles and careful attention to particular cases. We should make our reasons public, examine their consequences, and remain willing to revise a rule when experience reveals a genuine failure.