What Do We Mean by Justice?

When people call something unjust, they may mean that a rule was broken, that someone was treated unequally, that someone did not get what they deserved, that a person's rights were violated, or that a relationship was damaged. These are different ideas, and confusing them makes discussions about justice frustrating.

This primer introduces several influential approaches. None is presented as the correct one.

These are simplified summaries of rich and contested traditions.

• Justice as fairness (John Rawls): fair principles are those people would choose without knowing their own position in society. Rawls argued this would include equal basic liberties and arranging inequalities to benefit the least advantaged.
• Entitlement theory (Robert Nozick): a distribution is just if it arises from just acquisition and voluntary transfer, regardless of the resulting pattern.
• Utilitarian approaches: just arrangements are those that produce the greatest overall well-being.
• The capabilities approach (Amartya Sen, Martha Nussbaum): justice is assessed by what people are actually able to do and be. Sen argued for comparing real alternatives to reduce manifest injustice rather than seeking a perfect ideal.
• Restorative justice: wrongdoing is understood as harm to relationships and communities; justice involves repairing harm, often with participation of those affected.
• Many religious and cultural traditions frame justice in terms of dharma, righteousness, duty or right relationship, each with its own detailed understanding.

These approaches disagree on fundamental questions: whether justice is about outcomes or procedures, whether equality or liberty takes priority, and what we owe to strangers. Yet most share a commitment to treating people with equal dignity and to giving reasons that others could, in principle, accept.

Recognising which conception of justice someone is using can turn a heated argument into a clarifying conversation.

Justice is not only a matter for courts and governments. Families decide how to share chores and inheritance; teachers decide how to grade; workplaces decide how to pay and promote. In each case, asking which idea of fairness is at work — and whether everyone affected would accept it — is a useful discipline.