I wanted to note a few encyclicals that it would benefit today’s Catholics to read. Some of the popes in the not-too-distant past saw the disaster coming in faith in morals that make up the 20th and 21st centuries, both within the Church and within the wider world.
Mirari Vos was written by Pope Gregory XVI on August 15, 1832 against Religious Indifferentism. It is an interesting read. I wonder of Gregory XVI would think of today?
The Syllabus of Errors was issued by Pope Pius IX on December 8, 1864. If you read it and then compare was is condemned in them to the confusion of today, you can see that Pius IX could see the mess of modern day coming.
Humanum Genus deals with Freemasonry, and the dangers it poses to Church and society. Pope Leo XIII wrote this on April 20, 1884.
On September 8, 1907 Saint Pius X (the last pope to be declared a saint) released Pascendi Dominici Gregis, the encyclical warning against Modernism. It is interesting to read it, and then compare it against the state of the Church today. Modernists cause horrible confusion within the Church, teaching good as evil and evil as good.