30 If those men who now in Mexico persecute their brothers and fellowcitizens for no other reason than that these latter are guilty of keeping the laws of God, would only recall to memory and consider dispassionately the vicissitudes of their country as history reveals them to us, they must recognize and publicly confess that whatever there is of progress, of civilization, of the good and the beautiful, in their country is due solely to the Catholic Church. In fact every man knows that after the introduction of Christianity into Mexico, the priests and religious especially, who are now being persecuted with such cruelty by an ungrateful government, worked without rest and despite all the obstacles placed in their way, on the one hand by the colonists who were moved by greed for gold and on the other by the natives who were still barbarians, to promote greatly in those vast regions both the splendor of the worship of God and the benefits of the Catholic religion, works and institutions of charity, schools and colleges for the education of the people and their instruction in letters, the sciences, both sacred and profane, in the arts and the crafts.
Source: Iniquis Afflictisque (Vatican.va)