Abstract
This is the third in a projected series of companion volumes to major philosophers. According to a prefatory note, the series is intended both for students and nonspecialists as well as for advanced students and specialists, serving the former as a reference work and the latter as a conspectus of recent developments in the interpretation of the philosopher. Since the essays comprising the volumes are specially commissioned for them, they can reinforce one another and present an internally coherent interpretation of the philosopher's thought as a whole. Such a collection should have the merit of a comprehensive introduction to the philosopher's work, while providing a detailed treatment of particular topics by authors with special expertise.