In ethics, believers in natural law hold (a) that there is a natural order to the human world, (b) that this natural order is good, and (c) that people therefore ought not to violate that order. Natural Law views of morality are upheld by the Roman Catholic Church in its catechism (body of teaching), and in Papal Encyclicals such as 'Humanae Vitae' and 'Personae Vitae'. You can read these documents in Mr Baron’s notes on the Public area of WCS website.