Hence from all we have hitherto said, it is clear beloved Catholics that we cannot approve the opinions which some [Protestants, Jews, and other heretics] comprise under the head of Americanism [freedom].
Pope Leo XIIIIt is an in, a grave evil and a disturbance of the right order, for a larger and higher organisation, to arrogate to itself functions which can be performed efficiently by smaller and lower bodies.
Pope Leo XIIIWith reason, then, the common opinion of mankind, little affected by the few dissentients who have contended for the opposite view, has found in the careful study of nature, and in the laws of nature, the foundations of the division of property, and the practice of all ages has consecrated the principle of private ownership, as being pre-eminently in conformity with human nature, and as conducing in the most unmistakable manner to the peace and tranquility of human existence.
Pope Leo XIIIIt is shameful and inhuman to treat men like chattels to make money by, or to regard them merely as so much muscle or physical power.
Pope Leo XIII