Humani Generis Unitas

Humani generis unitas (Latin; English translation: On the Unity of the Human Race) was a planned encyclical of Pope Pius XI before his death on February 10, 1939. The draft text condemned antisemitism, racism and the persecution of Jews. Because it was never promulgated, it is sometimes referred to as "The Hidden Encyclical" or "The Lost Encyclical." Humani generis unitas was written by three Jesuits under the leadership of John LaFarge. The draft text was not published until 1995 in France (by Passelecq and Suchecky under the title L’Encyclique Cachee de Pie XI) and in 1997 in English as The Hidden Encyclical of Pius XI.