Down the ages
1754: Benedict XIV. Quod Provinciale (What is Provincial). Forbade Christians to take or use Muslim names to avoid taxation.
1766: Clement XIII. Christianae Reipublicae (For the Christian Republic). Reminded bishops of duty to destroy evil books.
1884: Leo XIII. Humanum Genus, (The Human Race). Condemned freemasonry
1931: Pius XI. Non Abbiamo Bisogno, (We Don't Need It). Written in Italian condemning Italian fascism. Mit Brennender Sorge (With Burning Sorrow) in 1937, written in German against the Nazi regime.
1950: Pius XII. Humani Generis, (On the Human Race), permitted the discussion of Darwin's theory of evolution.
1960: John XXIII. "Peace on Earth", called for the end of the nuclear arms race.
1967: Paul VI. "Progress of Peoples", called for peace through development.
1995: John Paul II. "Evangelium Vitae", (Gospel of Life), restated teachings on abortion, birth control, and euthanasia.