12 So great is this struggle of the passions and so serious the dangers involved, that we must either anticipate ultimate ruin or seek for an efficient remedy. It is of course both right and necessary to punish malefactors, to educate the masses, and by legislation to prevent crime in every possible way: but all this is by no means sufficient. The salvation of the nations must be looked for higher. A power greater than human must be called in to teach men's hearts, awaken in them the sense of duty, and make them better. This is the power which once before saved the world from destruction when groaning under much more terrible evils. Once remove all impediments and allow the Christian spirit to revive and grow strong in a nation, and that nation will be healed. The strife between the classes and the masses will die away; mutual rights will be respected. If Christ be listened to, both rich and poor will do their duty. The former will realise that they must observe justice and charity, the latter self restraint and moderation, if both are to be saved. Domestic life will be firmly established by the salutary fear of God as the Lawgiver. In the same way the precepts of the natural law, which dictates respect for lawful authority and obedience to the laws, will exercise their influence over the people. Seditions and conspiracies will cease. Wherever Christianity rules over all without let or hindrance there the order established by Divine Providence is preserved, and both security and prosperity are the happy result. The common welfare, then, urgently demands a return to Him from whom we should never have gone astray; to Him who is the Way, the Truth, and the Life,-and this on the part not only of individuals but of society as a whole. We must restore Christ to this His own rightful possession. All elements of the national life must be made to drink in the Life which proceedeth from Him legislation, political institutions, education, marriage and family life, capital and labour. Everyone must see that the very growth of civilisation which is so ardently desired depends greatly upon this, since it is fed and grows not so much by material wealth and prosperity, as by the spiritual qualities of morality and virtue.
Source: Tametsi Futura Prospicientibus (Vatican.va)