Thom interprets Kilwardby’s science of logic as a logic of intensions with its own proof theory and semantics. This comprehensive reconstruction of Kilwardby’s logic shows the medieval master to be one of the most interesting logicians of the thirteenth century.

Kilwardby’s work on the first three books of the Nicomachean Ethics is the first medieval commentary on the Ethics whose author is known. The critically edited Latin text contains a careful explanation of Aristotle’s text on happiness and moral virtue.

"Robert Kilwardby is a central figure in late medieval philosophy and theology, but key areas of his thought still remain unexamined in a systematic way. This book offers a comprehensive overview of his works, ranging from topics in logic to theology, done in a way that is accessible to non-specialists and to anyone interested in medieval thought"--

Cardinal and Archbishop of Canterbury Robert Kilwardby OP (c. 1215-1279) was a very important and influential thinker in his time, but he has not received the scholarly attention that he deserves. In this book we present the first study of all of his philosophical thinking from logic and grammar to metaphysics and ethics.