him reserving the right of issuing it again to himself. The buyer of a copy may make the contents of the book his own and work them up again in any form of his own that he chooses; he buys the material part of the book, paper, binding, etc., and may make what use of them he pleases; but he does not purchase the right to issue the book again, and he violates justice if he does so against the author's wish. The same holds with regard to patent right.
This controversy is of little practical importance, for sufficient protection is provided in most civilized countries by positive law.
3. We saw above that no one except God can have an absolute property in man's life or members. No man, then, can become the chattel of another so that he may lawfully be disposed of like a brute beast. Christian teaching has banished such an idea from Christendom at least. On the other hand, there is no difficulty in admitting that one man may make over his services to another for as long as he pleases. Theoretically, therefore, there seems no reason for saying that slavery is against the law of nature. We here understand by the term the state of perpetual subjection of one to another so that he owes that other his life service in return for board, lodging, and clothes. Practically, great abuses usually accompanied slavery, and we must allow that it is out of harmony with the spirit of the Gospel. Chiefly through the wise and gradual action of the Church, it has ceased to exist as an institution among civilized nations. However, we must not forget that penal servitude is still the just and recognized punishment for grave crime. Merely looking at the question from the point of view of the strict law of nature, we must acknowledge that a state of slavery arising from contract, or birth, or in punishment for crime, or as the result of a just war, is not in itself immoral.
4. Animals and the earth, together with all that they produce, may become man's absolute property. God has imposed on him the obligation of maintaining himself and those who are dependent upon him, and he has a consequent right to make his own whatever is necessary and useful for that purpose, if it has not been appropriated by someone else. He has a right to provide not only for his immediate wants, but for the future also; not only for himself, but for his offspring. In other words, nature herself gives man the right of private property. This right is not given by the State; it is anterior to the State, and its preservation and defence is one of the
