The Church regards as enemy an idea or movement known as “Naturalism”. I had a friend recently ask me what it is, and I think I gave a pretty good answer. But my answer is nowhere near as good as that of Pope Leo XIII, in his encyclical Humanum Genus, written on April 20, 1884. This encyclical deals with the threats of Freemasonry and Naturalism.
I recommend reading the whole encyclical, because it gives a structure for the breakdown of morality in our own day. Also, as I mentioned in my review of the movie For Greater Glory, the persecution of the Church in Mexico was a Masonic persecution. Then there is the French Revolution, etc.
Below is part of the description of Naturalism from Humanum Genus:
12. Now, the fundamental doctrine of the naturalists, which they sufficiently make known by their very name, is that human nature and human reason ought in all things to be mistress and guide. Laying this down, they care little for duties to God, or pervert them by erroneous and vague opinions. For they deny that anything has been taught by God; they allow no dogma of religion or truth which cannot be understood by the human intelligence, nor any teacher who ought to be believed by reason of his authority. And since it is the special and exclusive duty of the Catholic Church fully to set forth in words truths divinely received, to teach, besides other divine helps to salvation, the authority of its office, and to defend the same with perfect purity, it is against the Church that the rage and attack of the enemies are principally directed.
13. In those matters which regard religion let it be seen how the sect of the Freemasons acts, especially where it is more free to act without restraint, and then let any one judge whether in fact it does not wish to carry out the policy of the naturalists. By a long and persevering labor, they endeavor to bring about this result – namely, that the teaching office and authority of the Church may become of no account in the civil State; and for this same reason they declare to the people and contend that Church and State ought to be altogether disunited. By this means they reject from the laws and from the commonwealth the wholesome influence of the Catholic religion; and they consequently imagine that States ought to be constituted without any regard for the laws and precepts of the Church.
14. Nor do they think it enough to disregard the Church – the best of guides – unless they also injure it by their hostility. Indeed, with them it is lawful to attack with impunity the very foundations of the Catholic religion, in speech, in writing, and in teaching; and even the rights of the Church are not spared, and the offices with which it is divinely invested are not safe. The least possible liberty to manage affairs is left to the Church; and this is done by laws not apparently very hostile, but in reality framed and fitted to hinder freedom of action. Moreover, We see exceptional and onerous laws imposed upon the clergy, to the end that they may be continually diminished in number and in necessary means. We see also the remnants of the possessions of the Church fettered by the strictest conditions, and subjected to the power and arbitrary will of the administrators of the State, and the religious orders rooted up and scattered.
17. But the naturalists go much further; for, having, in the highest things, entered upon a wholly erroneous course, they are carried headlong to extremes, either by reason of the weakness of human nature, or because God inflicts upon them the just punishment of their pride. Hence it happens that they no longer consider as certain and permanent those things which are fully understood by the natural light of reason, such as certainly are – the existence of God, the immaterial nature of the human soul, and its immortality. The sect of the Freemasons, by a similar course of error, is exposed to these same dangers; for, although in a general way they may profess the existence of God, they themselves are witnesses that they do not all maintain this truth with the full assent of the mind or with a firm conviction. Neither do they conceal that this question about God is the greatest source and cause of discords among them; in fact, it is certain that a considerable contention about this same subject has existed among them very lately. But, indeed, the sect allows great liberty to its votaries, so that to each side is given the right to defend its own opinion, either that there is a God, or that there is none; and those who obstinately contend that there is no God are as easily initiated as those who contend that God exists, though, like the pantheists, they have false notions concerning Him: all which is nothing else than taking away the reality, while retaining some absurd representation of the divine nature.
18. When this greatest fundamental truth has been overturned or weakened, it follows that those truths, also, which are known by the teaching of nature must begin to fall – namely, that all things were made by the free will of God the Creator; that the world is governed by Providence; that souls do not die; that to this life of men upon the earth there will succeed another and an everlasting life.
19. When these truths are done away with, which are as the principles of nature and important for knowledge and for practical use, it is easy to see what will become of both public and private morality. We say nothing of those more heavenly virtues, which no one can exercise or even acquire without a special gift and grace of God; of which necessarily no trace can be found in those who reject as unknown the redemption of mankind, the grace of God, the sacraments, and the happiness to be obtained in heaven. We speak now of the duties which have their origin in natural probity. That God is the Creator of the world and its provident Ruler; that the eternal law commands the natural order to be maintained, and forbids that it be disturbed; that the last end of men is a destiny far above human things and beyond this sojourning upon the earth: these are the sources and these the principles of all justice and morality. If these be taken away, as the naturalists and Freemasons desire, there will immediately be no knowledge as to what constitutes justice and injustice, or upon what principle morality is founded. And, in truth, the teaching of morality which alone finds favor with the sect of Freemasons, and in which they contend that youth should be instructed, is that which they call “civil,” and “independent,” and “free,” namely, that which does not contain any religious belief. But, how insufficient such teaching is, how wanting in soundness, and how easily moved by every impulse of passion, is sufficiently proved by its sad fruits, which have already begun to appear. For, wherever, by removing Christian education, this teaching has begun more completely to rule, there goodness and integrity of morals have begun quickly to perish, monstrous and shameful opinions have grown up, and the audacity of evil deeds has risen to a high degree. All this is commonly complained of and deplored; and not a few of those who by no means wish to do so are compelled by abundant evidence to give not infrequently the same testimony.
Again, you should read the whole encyclical 🙂