The works of Thomas Aquinas, one of the greatest Western philosophers as well as theologians of the Christian Church, are not only illuminating (for his questions as much as his answers) but surprisingly relevant to our concerns today. This book represents a long overdue modern comprehensive presentation of the total thought of Aquinas. While traditional studies of Aquinas invariably deal with either his philosophy or his theology, Davies introduces the full range of Aquinas's thinking, relating it to writers earlier and later than Aquinas himself. The book will be of considerable interest to professional theologians and philosophers, as well as to those with particular interest in medieval thinking. It is designed to be accessible to the general reader who has no specialist knowledge of medieval thought or professional training in philosophy or theology.