The maternal love of the Catholic Church embraces all people. As you know, venerable brother, the Church from the beginning sought to completely eliminate slavery, whose wretched yoke has oppressed many people. It is the industrious guardian of the teachings of its Founder who, by His words and those of the apostles, taught men the fraternal necessity which unites the whole world. From Him we recall that everybody has sprung from the same source, was redeemed by the same ransom, and is called to the same eternal happiness. He assumed the neglected cause of the slaves and showed Himself the strong champion of freedom. Insofar as time and circumstances allowed, He gradually and moderately accomplished His goal. Of course, pressing constantly with prudence and planning, He showed what He was striving for in the name of religion, justice, and humanity. In this way He put national prosperity and civilization in general into His debt. This zeal of the Church for liberating the slaves has not languished with the passage of time; on the contrary, the more it bore fruit, the more eagerly it glowed. There are incontestable historical documents which attest to that fact, documents which commended to posterity the names of many of Our predecessors. Among them St. Gregory the Great, Hadrian I, Alexander III, Innocent III, Gregory IX, Pius II, Leo X, Paul III, Urban VIII, Benedict XIV, Pius VII, and Gregory XVI stand out. They applied every effort to eliminate the institution of slavery wherever it existed. They also took care lest the seeds of slavery return to those places from which this evil institution had been cut away.