Opuscula
If you are interested in social teaching, and in particular, the question of continuity-rupture in this context, you will be interested in Opuscula, the blog written by K Gurries. For example, his post On Globalization and Political Authority analyses the concept of globalisation in Caritas in Veritate and concludes with a survey of papal statements on International Order, asking the question "Rupture or Continuity?"
More recently, there is a post on The Intervention of Mgr. Dupanloup (Part I) looking at how the great Bishop of Orleans defended the encyclical letter of Blessed Pius IX Quanta Cura in the face of fierce hostility in the press.
More recently, there is a post on The Intervention of Mgr. Dupanloup (Part I) looking at how the great Bishop of Orleans defended the encyclical letter of Blessed Pius IX Quanta Cura in the face of fierce hostility in the press.