Pius XI
Pope Pius XI (1857-1939) (original name Ambrogio Damiano Achille Ratti) , was born in Desio, Lombardy, Austrian Empire [now in Italy]. His father owned a silk factory. He was ordained a priest in 1879 and embarked on an academic career within the Church. He obtained three doctorates (in philosophy, canon law and theology) at the Gregorian University in Rome, and then from 1882 to 1888 was a professor at the seminary in Padua. His scholarly specialty was as an expert paleographer, a student of ancient and medieval Church manuscripts. After many years as a researcher at a Catholic library, Ratti was made Papal nuncio to Poland in 1918, then cardinal and archbishop of Milan in 1921, and then Pope in the following year.
Among his papal encyclicals, Pius XI is most remembered for lending the support of the Church to Distributism and Subsidiarity in Quadragesimo Anno. It was promulgated in 1931 to mark ‘forty years’ since Pope Leo XIII’s (1878–1903) encyclical De Rerum Novarum. It restated that encyclical’s support for intermediating social associations and warnings against both socialism and unrestrained capitalism as enemies to human freedom and dignity.
The following excerpt defined the principle of subsidiarity that has been a feature of Catholic thought ever since: