I’m going to need some structure to this trove of information. I should sign up for a few non-credit courses in Church encyclical history and their context.
History can be so overwhelming in its depth that you stare gape-mouthed without a guide.
Rerum Novarum and Providentissimus Deus are the most important ones I knew about in passing. I’ll start with those. :) Thanks.
HAURIETIS AQUAS - ENCYCLICAL OF POPE PIUS XII ON DEVOTION TO THE SACRED HEART MAY 15, 1956
The first is a codification of Divine Law and as such is immutable. For Bergoglio et alia refer to section 6.
The latter two, are partial listings of condemned heresies and errors. They have encyclicals associated with them as well - just check a nearby date on the list.
THE SYLLABUS OF ERRORS CONDEMNED BY PIUS IX - 1864
SYLLABUS CONDEMNING THE ERRORS OF THE MODERNISTS - LAMENTABILI SANE - Pius X July 3, 1907