Justice is one of the most important moral and political concepts. The word comes from the Latin jus, meaning right or law. The Oxford English Dictionary defines the “just” person as one who typically “does what is morally right” and is disposed to “giving everyone his or her due,” offering the word “fair” as a synonym. But philosophers want to get beyond etymology and dictionary definitions to consider, for example, the nature of justice as both a moral virtue of character and a desirable quality of political society, as well as how it applies to ethical and social decision-making. This article will focus on Western philosophical conceptions of justice. These will be the greatest theories of ancient Greece (those of Plato and Aristotle) and of medieval Christianity (Augustine and Aquinas), two early modern ones (Hobbes and Hume), two from more recent modern times (Kant and Mill), and some contemporary ones (Rawls and several successors). Typically the article considers not only their theories of justice but also how philosophers apply their own theories to controversial social issues—for example, to civil disobedience, punishment, equal opportunity for women, slavery, war, property rights, and international relations.
For Plato, justice is a virtue establishing rational order, with each part performing its appropriate role and not interfering with the proper functioning of other parts. Aristotle says justice consists in what is lawful and fair, with fairness involving equitable distributions and the correction of what is inequitable. For Augustine, the cardinal virtue of justice requires that we try to give all people their due; for Aquinas, justice is that rational mean between opposite sorts of injustice, involving proportional distributions and reciprocal transactions. Hobbes believed justice is an artificial virtue, necessary for civil society, a function of the voluntary agreements of the social contract; for Hume, justice essentially serves public utility by protecting property (broadly understood). For Kant, it is a virtue whereby we respect others’ freedom, autonomy, and dignity by not interfering with their voluntary actions, so long as those do not violate others’ rights; Mill said justice is a collective name for the most important social utilities, which are conducive to fostering and protecting human liberty. Rawls analyzed justice in terms of maximum equal liberty regarding basic rights and duties for all members of society, with socio-economic inequalities requiring moral justification in terms of equal opportunity and beneficial results for all; and various post-Rawlsian philosophers develop alternative conceptions.
Western philosophers generally regard justice as the most fundamental of all virtues for ordering interpersonal relations and establishing and maintaining a stable political society. By tracking the historical interplay of these theories, what will be advocated is a developing understanding of justice in terms of respecting persons as free, rational agents. One may disagree about the nature, basis, and legitimate application of justice, but this is its core.
Table of Contents
1-Ancient Greece
a.Plato
b.Aristotle
2-Medieval Christianity
a.Augustine
b.Aquinas
3-Early Modernity
a.Hobbes
b.Hume
4-Recent Modernity
a.Kant
b.Mill
5-Contemporary Philosophers
a.Rawls.
b.Post-Rawls
6-References and Further Readings
a.Primary Sources
b.Secondary Sources