Not only is the fifth article of the covenant devoted to this theme, but the relationship of social concern to evangelism was one of the most intensely discussed issues at the congress. (religion-online.org)
In ST I - II, Question 19, Fifth Article, Aquinas addresses the question: «Is the Will Evil if It Wills Contrary to Erroneous Reason?» (firstthings.com)
The fifth article in the series considers the controversial issue of horse slaughter for human consumption. (choicesmagazine.org)