Although best known for his commentaries on the Summa of Thomas Aquinas, Cajetan also wrote dozens of other works, including short treatises on socioeconomic problems.
Published under the name On Exchange and Usury, these treatises reflect on the banking industry of the early modern era in the context of the Church’s usury doctrine, examining which transactions were licit, and which involved usury, among other things. The book is part of CLP’s growing series, Sources in Early Modern Economics, Ethics, and Law.
In the introduction, Raymond de Roover summarizes some of the historical context, as well as Cajetan’s contribution therein:
Because of the Church’s usury doctrine, bankers were not supposed to charge interest and, consequently, had to look for some other way of lending money at a profit, with the result that banking became tied to exchange: local banking to manual exchange (cambium minutum), and foreign banking to real exchange or exchange by bills (cambium per litteras). Since the discounting of commercial paper was ruled out by the usury prohibition, bankers bought bills of exchange at a price that was determined by the foreign exchange rates…
It goes without saying that medieval and Renaissance bankers could not afford to lend money gratuitously and that interest was charged surreptitiously by being concealed in the rate of exchange, but the theologians, including [Thomas] Cajetan, were unable to accept this fact without being forced to condemn all banking as usurious and to brand it as a sinful profession, like pawnbroking, histrionics, or prostitution. This was the ticklish problem with which Cajetan came to grips.
Although he was in sympathy with humanism, he approached the issue in scholastic fashion and tried to determine which exchange transactions were licit and which were illicit. In his tract, he starts out by dividing exchange transactions into three categories: those that were clearly licit, those that were clearly illicit, and those that were doubtful.
Purchase the book here.
Add it to your bookshelf on Goodreads here.
Check out other titles in the Sources in Early Modern Economics, Ethics, and Law series for more English translations and editions of formative but previously inaccessible texts in the realm of economics, ethics, and law. Subscribe to CLP’s mailing list or follow CLP on Facebook or Twitter for updates on forthcoming titles.