Christian’s Library Press has released a new translation of two treatises on exchange and usury by Thomas Cajetan (1469-1534), a Dominican theologian, philosopher, and cardinal.
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… (more…)