In April the Thomistic Institute (Washington) organized a lecture Aquinas on Sin, Suffering and Evil by Jennifer Frey – a professor of philosophy at the University of South Carolina. The recording of the lecture has recently been published at SoundCloud.
The main topic of the lecture was Aquinas’ approach to the issue of sin: the analysis of its nature, three main causes (ignorance, weakness and malice) and the way it distorts human reason and happiness. Main outlines of this speech may be found in Frey’s paper Aquinas on Sin and Self-Love, published at Academia.edu.