The books in this set, originally published between 1939 and 1991:
- Focus on the concept of virtue, and in particular on the virtue of wisdom or knowledge,
- Study the pilgrimage of the Ancient World in its search for moral truth.
- Discuss the political implication of the spread of science in antiquity.
- Examine the nature of Pre-Socratic thought and the three pluralist responses of Empedocles, Anaxagoras and the early Atomists.