A study of the major philosophical theories of knowledge from Plato to Husserl intending to show the pivotal role of Descartes and the influence of his unjustified assumption of mental reality for ideas. On the basis of this study, the book suggests the need to return to the pre-Cartesian cognitive realism of the Greeks and Medievals.

Thomas Aquinas' Commentary on the Metaphysics has long been con sidered by many as one of the most interesting, most rewarding of all his works. Yet strangely enough, there has been no extensive study of this work, at least none that has ever reached print. It is in the hope of partially filling this gap in medieval research that the present study of the metaphysical system of the Commentary was conceived. However, the discussion of the Commentary's metaphysics must simultaneously be an investigation into the reasons which motivated Aquinas in the composition of his work. Did he wish to...

Is Aquinas's Sententia libri Ethicorum an interpretation of Aristotle based on principles of Christian ethics'? Or do we have in that work a presentation of the foundation of Aquinas's moral philosophy? Professor Doig answers these questions through an examination of the historical context within which the Sententia was composed.
In Chapters 1-2, the work's role as a corrective of earlier commentaries is established. Chapter 3, by examining philosophy at Paris between 1215 and 1283, reveals that the proposal by Aquinas of a moral philosophy would have been...