Cambridge Philosophical Texts in Context offers a new way of understanding and teaching the canonical texts in the history of philosophy. The purpose of the series is to allow students to comprehend the context in which these texts emerged by providing the primary materials that are their source and immediate intellectual background. These contextual texts are often neglected because they are obscure, or unavailable in English translation, or both. Now this background source material will be available in convenient editions with helpful explanatory introductions and annotation.