Part 2:

The 1971 Synod of Bishops (the second, I think, in the post-Vatican II years), the topic was "Justice in the World."  I suppose the document might seem dated now (I haven't re-read in years), but I think in most respects it will and does stand the test of time.  You can probably find it online.  The document is remembered for its assertion that ""Action on behalf of justice and participation in the transformation of the world fully appears to us as a constitutive dimension of the preaching of the gospel ..." 

Vatican II marked a shift in emphasis from the legalism of the medieval manuals to the personalism of the Biblical witness as a way of thinking about the moral life.  Fr. Bernard Haring's "Law of Christ" -- written mostly in the pre-Council years -- is perhaps a hinge on which that shift turns.  It's fascinating to read it in the light of Vatican II, which it both anticipated and influenced. (cont'd.)