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Quadragesimo anno

Quadragesimo anno

Book by Pope Pius XI
Quadragesimo anno is an encyclical issued by Pope Pius XI on 15 May 1931, 40 years after Leo XIII's encyclical Rerum novarum, further developing Catholic social teaching. Unlike Leo XIII, who addressed the condition of workers, Pius XI discusses... Wikipedia
Originally published: May 15, 1931
Author: Pope Pius XI