Click here to listen to Anthony Kenny consider the place of law in Aquinas' ethics (from 6 minutes in).  Natural law is contrasted with Kant and the Utiltarians.  Should you always obey your conscience?  Not necessarily as conscience can be ill-informed. Did Tony Blair do right in following his conscience over the Iraq war? Do you ahve to be a Christian to follow Natural law?  No, argues Kenny.  Natural Theology doesn't require God in the same way as revealed theology, (14 minutes).

Summa Contra Gentiles is also discussed – how Aquinas believed that a discourse with Jews and Muslims is possible on the basis of reason alone.