Theories of justice concern the philosophical analysis of legal concepts and issues surrounding the fundamental idea of "justice." These concepts are revealed in the writings of philosophers, such as Plato, Aristotle, Cicero, St. Thomas Aquinas, Thomas Hobbes, John Locke, Jean-Jacques Rousseau, Jeremy Benthem, John Stuart Mill, John Rawls, Ronald Dworkin, and Robert Nozick. Equally important are the contemporary applications of these "classic" analyses.
See also these guides:
[Image of Plato and Aristotle close up, in Raphael Sanzio's "The School of Athens or Scuola di Atene," from Image Editor's photostream.]