The ancient Greek philosopher Epicurus and his followers advanced a sophisticated theory of justice that occupied a middle position between Plato and Aristotle, on the one hand, and some Sophists, on the other. They held that justice is neither fully natural nor fully conventional, that there is a robust virtue of justice, and that it is always better to be just than to be unjust, but it is not always better to obey the laws. In this book, the first English-language monograph on the topic, Jan Maximilian Robitzsch draws on a range of sources including papyrological evidence to give a comprehensive account of Epicurean justice. He shows how it relates to Epicurean philosophy as a whole and discusses to what extent it can be seen to anticipate modern positions such as contractarianism and legal positivism.