The Summa Theologiae ranks among the greatest documents of the Christian Church, and is a landmark of medieval western thought. It is regularly consulted by scholars of theology, philosophy and a range of related academic disciplines. This paperback reissue of the classic Latin/English edition first published by the English Dominicans in the 1960s and 1970s has been undertaken in response to regular requests from around the world. The original text is unchanged, except for the correction of a small number of typographical errors. The parallel English and Latin texts can be used successfully by anybody with a basic knowledge of Latin, while the presence of the Latin text allowed the translators a degree of freedom in adapting their English version for modern readers. Each volume contains a glossary of technical terms and is designed to be complete in itself to serve for private study or as a course text.