_fundamentum_ and _titulus_: 'In the ownership of goods two things are to be discussed. The first is why one thing should belong to one man and another thing to another. The second is why this particular field should belong to this man, that field to that man. With regard to the former inquiry, it may be said that the ownership of things is according to the law of nations, but with regard to the second, it may be said to result from the positive law, because in former times one thing was appropriated by one man and another thing by another.' It must not be supposed, however, from what we have just said, that there are no natural titles to property. Labour, for instance, is a title flowing from the natural law, as also is occupancy, and in certain circumstances, prescription. All that is meant by the distinction between _fundamentum_ and _titulus_ is that, whereas it can be clearly demonstrated by natural law that the goods of the earth, which are given by God for the benefit of the whole of mankind, cannot be made use of to their full advantage unless they are made the subject of private ownership, particular goods cannot be demonstrated to be the lawful property of this or that person unless some human act has intervened. This human act need not necessarily be an act of agreement; it may equally be an act of some other kind--for instance, a decree of the law-giver, or the exercise of labour upon one's own goods. In the latter case, the additional value of the goods becomes the lawful property of the person who has exerted the labour. Aquinas therefore pronounced unmistakably in favour of the legitimacy of private property, and in doing so was in full agreement with the Fathers of the Church. He was followed without hesitation by all the later theologians, and it is abundantly evident from their writings that the right of private property was the keystone of their whole economic system.[2] [Footnote 1: II. ii. 57, 3.] [Footnote 2: A community of goods, more or less complete, and a denial of the rights of private property was part of the teaching of many sects which were condemned as heretical--for instance, the Albigenses, the Vaudois, the Bégards, the Apostoli, and the Fratricelli. (See Brants, _Op. cit._, Appendix II.)] Communism therefore was no part of the scholastic teaching, but it must not be concluded from this that the mediævals approved of the unregulated individualism which modern opinion allows to the owners of property. The very strength of the right to own property entailed as a consequence the duty of making good use of it; and a clear distinction was drawn between the power 'of procuring and dispensing' property and the power of using it. We have dealt with the former power in the present section, and we shall pass to the consideration of the latter in the next. In a later chapter we shall proceed to discuss the duties which attached to the owners of property in regard to its exchange.