Pope Pius XI (31 May 1857 – 10 February 1939), born Ambrogio Damiano Achille Ratti, was Pope from 6 February 1922, and sovereign of Vatican City from its creation as an independent state on 11 February 1929 until his death on 10 February 1939. He issued numerous encyclicals including Quadragesimo Anno, highlighting capitalistic greed of international finance, and social justice issues, andQuas Primas, establishing the feast of Christ the King. He took as his papal motto, “Christ’s peace in Christ’s kingdom”.
Venerable Pope Pius XII born Eugenio Marìa Giuseppe Giovanni Pacelli (2 March 1876 – 9 October 1958), reigned as Pope, head of the Catholic Church and sovereign of Vatican City State, from 2 March 1939 until his death in 1958.
Omar F. A. Guiterrez, M.A. , Special Assistant to Archbishop George Lucas of the Archdiocese of Omaha. He’s also the author of “The Urging of Christ’s Love: The Saints and The Social Teaching of the Catholic”
Also visit Omar’s “Discerning Hearts” page Catholic Social Teaching 101