Latin
Ancient Law
Roman Law and Society, Useful Links to Roman Law Materials. 2.1.343
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The Res Mancipi of old Roman law were land --in historical times, land on Italian soil, --slaves and beasts of burden, such as horses and oxen. It is impossible to doubt that the objects which make up the class are the instruments of agricultural labour, the commodities of first consequence to a primitive people. Such commodities were at first, I imagine, called emphatically Things or Property, and the mode of conveyance by which they were transferred was called a Mancipium or Mancipation; but it was not probably till much later that they received the distinctive appellation of Res Mancipi, "Things which require a Mancipation." By their side there may have existed or grown up a class of objects, for which it was not worth while to insist upon the full ceremony of Mancipation. It would be enough if, in transferring these last from owner to owner, a part only of the ordinary formalities were proceeded with, namely, that actual delivery, physical transfer, or tradition, which is the most obvious index of a change of proprietorship. Such commodities were the Res Nec Mancipi of the ancient jurisprudence, "things which did not require a Mancipation," little prized probably at first, and not often passed from one group of proprietors to another. While, however, the list of the Res Mancipi was irrevocably closed, that of the Res Nec Mancipi admitted of indefinite expansion; and hence every fresh conquest of man ver material nature added an item to the Res Nec Mancipi, or effected an improvement in those already recognized. Insensibly, therefore, they mounted to an equality with the Res Mancipi, and the impression of an intrinsic inferiority being thus dissipated, men began to observe the manifold advantages of the simple formality which accompanied their transfer over the more intricate and more venerable ceremonial. Two of the agents of legal amelioration, Fictions and Equity, were assiduously employed by the Roman lawyers to give the practical effects of a Mancipation to a Tradition: and, though Roman legislators long shrank from enacting that the right of property in a Res Mancipi should be immediately transferred by bare delivery of the article, yet even this step was at last ventured upon by Justinian, in whose jurisprudence the difference between Res Mancipi and Res Nec Mancipi disappears, and Tradition or Delivery becomes the one great conveyance known to the law. The marked preference which the Roman lawyers very early gave to Tradition caused them to assign it a place in their theory which has helped to blind their modern disciples to its true history. It was classed among the "natural" modes of acquisition, both because it was generally practiced among the Italian tribes, and because it was a process which attained its object by the simplest mechanism. If the expressions of the jurisconsults be pressed, they undoubtedly imply that Tradition, which belongs to the Law Natural, is more ancient than Mancipation, which is an institution of Civil Society; and this, I need not say, is the exact reverse of the truth.