"Humani Generis Unitas", Ledochowski And Pius XI

In June 1938, Pope Pius XI summoned American Jesuit John La Farge, who began to prepare a draft of "Humani Generis Unitas", which LaFarge and two other Jesuits; Gustav Gundlach and Gustave Desbuquois . Another Jesuit translated the draft encyclical into Latin, presenting it to Superior General Vladimir Ledochowski, of the Society of Jesus; who had chosen Gundlach and Desbuquois for the project. The draft encyclical was delivered to the Vatican in September 1938.

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"Humani generis unitas" Latin for "On the Unity of the Human Race"

Photo of Pius XI