This collection makes available in English twelve papers by the distinguished French scholar Professor Jacques Brunschwig. The essays deal with problems arising in the texts and doctrines of the three major philosophical schools of the Hellenistic period - Epicureanism, Stoicism and Scepticism. The author's strategy is to focus on some specific problem and then to enlarge the conclusion of his discussion so as to reformulate or reassess some more important issue. The main subjects tackled are: problems in Epicurean cosmology and linguistic theory; aspects of Stoic logic, ontology and theology; the history of Scepticism; and analysis of some of the conceptual tools used by the Sceptics in their anti-dogmatic arguments.