19 Who would not be moved by the thought of such miseries. We, indeed, who are holding the place of Christ, the loving Liberator and Redeemer of all mankind, and who so rejoice in the many and glorious good deeds of the Church to all who are afflicted, can scarcely express how great is Our commiseration for those unhappy nations, with what fullness of charity We open Our arms to them, how ardently We desire to be able to afford them every alleviation and support, with the hope, that, having cast off the slavery of superstition as well as the slavery of man, they may at length serve the one true God under the gentle yoke of Christ, partakers with Us of the divine inheritance. Would that all who hold high positions in authority and power, or who desire the rights of nations and of humanity to be held sacred, or who earnestly devote themselves to the interests of the Catholic religion, would all, everywhere acting on Our exhortations and wishes, strive together to repress, forbid, and put an end to that kind of traffic, than which nothing is more base and wicked.
Source: In Plurimis (Vatican.va)