On the whole, the attitude towards commerce seems to have grown more liberal in the course of the Middle Ages. At first all commerce was condemned as sinful; at a later period it was said to be justifiable provided it was influenced by good motives; while at a still later date the method of treatment was rather to regard it as a colourless act in itself which might be rendered harmful by the presence of bad motives. This gradual broadening of the justification of commerce is probably a reflection of the necessities of the age, which witnessed a very great expansion of commerce, especially of foreign trade. In the earlier centuries remuneration for undertaking risk was prohibited on the authority of a passage in the Gregorian Decretals, but the later writers refused to disallow it.[1] The following passage from Dr. Cunningham's Growth of English Industry and Commerce correctly represents the attitude of the Church towards commerce at the end of the Middle Ages: 'The ecclesiastic who regarded the merchant as exposed to temptations in all his dealings would not condemn him as sinful unless it were clear that a transaction were entered on solely for greed, and hence it was the tendency for moralists to draw additional distinctions, and refuse to pronounce against business practices where common sense did not give the benefit of the doubt.'[2] We have seen that one motive which would justify the carrying on of trade was the desire to support one's self and one's family. Of course this motive was capable of bearing a very extended and elastic interpretation, and would justify increased commercial profits according as the standard of life improved. The other motive given by the theologians, namely, the benefit of the State, was also one which was capable of a very wide construction. One must remember that even the manual labourer was bound not to labour solely for avaricious gain, but also for the benefit of his fellow-men. 'It is not only to chastise our bodies,' says Basil, 'it is also by the love of our neighbour that the labourer's life is useful so that God may furnish through us our weaker brethren';[3] and a fifteenth-century book on morality says: 'Man should labour for the honour of God. He should labour in order to gain for himself and his family the necessaries of life and what will contribute to Christian joy, and moreover to assist the poor and the sick by his labours. He who acting otherwise seeks only the pecuniary recompense of his work does ill, and his labours are but usury. In the words of St. Augustine, "thou shalt not commit usury with the work of thy hands, for thus wilt thou lose thy soul,"'[4] The necessity for altruism and regard for the needs of one's neighbour as well as of one's self were therefore motives necessary to justify labour as well as commerce; and it would be wrong to conclude that the teaching of the scholastics on the necessity for a good motive to justify trade operated to damp individual enterprise, or to discourage those who were inclined to launch commercial undertakings, any more than the insistence on the need for a similar motive in labourers was productive of idleness. What the mediæval teaching on commerce really amounted to was that, while commerce was as legitimate as any other occupation, owing to the numerous temptations to avarice and dishonesty which it involved, it must be carefully scrutinised and kept within due bounds. It was more difficult to insure the observance of the just price in the case of a sale by a merchant than in one by an artificer; and the power which the merchant possessed of raising the price of the necessaries of life on the poor by engrossing and speculation rendered him a person whose operations should be carefully controlled.
[Footnote 1: Cunningham, Growth of English Industry and Commerce, vol. i. p. 255.]
[Footnote 2: P. 255.]
[Footnote 3: Reg. Fus. Tract., XXXVII. i.]
[Footnote 4: Quoted in Janssen, op. cit., vol. ii. p. 9.]
Finally, it must be clearly understood that the attempt of some modern writers to base the mediæval justification of commerce on an analysis of all commercial gains as the payment for labour rests on a profound misunderstanding. As we have already pointed out, Aquinas distinctly rules out of consideration in his treatment of commerce the case where the goods have been improved in value by the exertions of the merchant. When the element of labour entered into the transaction the matter was clearly beyond doubt, and the lengthy discussion devoted to the question of commerce by Aquinas and his followers shows that in justifying commercial gains they were justifying a gain resting not on the remuneration for the labour, but on an independent title.
§ 8. Cambium.
There was one department of commerce, namely, cambium, or money-changing, which, while it did not give any difficulty in theory, involved certain difficulties in practice, owing to the fact that it was liable to be used to disguise usurious transactions. Although cambium was, strictly speaking, a special branch of commerce, it was nevertheless usually treated in the works on usury, the reason being that many apparent contracts of cambium were in fact veiled loans, and that it was therefore a matter of importance in discussing usury to explain the tests by which genuine and usurious exchanges could be distinguished. Endemann treats this subject very fully and ably;[1] but for the purpose of the present essay it is not necessary to do more than to state the main conclusions at which he arrives.
[Footnote 1: Studien, vol. i. p. 75.]
Although the practice of exchange grew up slowly and gradually during the later Middle Ages, and, consequently, the amount of space devoted to the discussion of the theory of exchange became larger as time went on, nevertheless there is no serious difference of opinion between the writers of the thirteenth century, who treat the subject in a fragmentary way, and those of the fifteenth, who deal with it exhaustively and systematically. Aquinas does not mention cambium in the Summa, but he recognises the necessity for some system of exchange in the De Eegimine Principum.[1] All the later writers who mention cambium are agreed in regarding it as a species of commerce to which the ordinary rules regulating all commerce apply. Francis de Mayronis says that the art of cambium is as natural as any other kind of commerce, because of the diversity of the currencies in different kingdoms, and approves of the campsor receiving some remuneration for his labour and trouble.[2] Nicholas de Ausmo, in his commentary on the Summa Pisana, written in the beginning of the fifteenth century, says that the campsor may receive a gain from his transactions, provided that they are not conducted with the sole object of making a profit, and that the gain he may receive must be limited by the common estimation of the place and time. This is practically saying that cambium may be carried on under the same conditions as any other species of commerce. Biel says that cambium is only legitimate if the campsor has the motive of keeping up a family or benefiting the State, and that the contract may become usurious if the gain is not fair and moderate.[3] The right of the campsor to some remuneration for risk was only gradually admitted, and forms the subject of much discussion amongst the jurists.[4] This hesitation in allowing remuneration for risk was not peculiar to cambium, but, as we have seen above, was common to all commerce. Endemann points out how the theologians and jurists unanimously insisted that cambium could not be justified except when the just price was observed, and that, when the doctrine attained its full development, the element of labour was but one of the constituents in the estimation of that price.[5]