From Aristotle to Thomas Aquinas

"Saint Thomas Aquinas is an Aristotelian (few scholars would question that) and he is the most important author in the entire history of natural law theory. Yet, there is no natural law theory in Aristotle. Even the concept of person, which is so important in Aquinas' ethics, seems to be foreign to Aristotle's culture and thought. How can Aquinas' ethics be said Aristotelian? ... In 'From Aristotle to Thomas Aquinas: natural law, practical knowledge, and the person,' Fulvio Di Blasi argues that Aquinas' concept of natural law, his personalism, and his overall approach to moral theory are deeply rooted in the very heart of Aristotle's ethics: in his concepts of practical knowledge, proairesis (moral choice), and practical syllogism, as well as in his account of the moral agency, the ultimate end and human social nature. Di Blasi goes as far as to connect Aquinas' definition of natural law to Aristotle's concept of 'proairesis.'"--