Pope Innocent IV (1250-1261) wrote if usury were permitted rich people would prefer to put their money in a usurious loan rather than invest in agriculture. Only the poor farm and if they didn't have the tools, famine would result. Burudian (d. 1358), a professor at the University of Paris wrote that: "Usury is evil... because the usurer seeks avariciously what has no finite limits". This places its results outside of nature. St. Bernardine of Siena (1380-1444) observed that usury concentrates the money of the community in the hand of the few.

Divine and human law: All mankind's moral/legal codes censured usury, normally with mild limits on interest rates. But the Old Testament stricly forbade Jews form taking usury from their "brothers" (other Jews), and discouraged taking it from strangers. The Scholastics looked on all mankind as brothers.

Other codes restricted usury: Code Of Hammurabi (2130-2088 BC) limited usury to 33%; Hindoo Law - Damdupat - limited interest to the full amount of the loan; Roman Law limited interest; Justinian’s 6th century Code reduced the 12½% limit of Constantine the Great, to 4-8%, and accumulated interest could not exceed principal. The Koran totally forbids usury, from the 7th century; Charlemagne’s laws flatly forbade usury in 806 AD. The Magna Carta placed limits on usury in 1215 AD. Most States of the United States enforced usury limits until 1981.

Fall Of The Usury Prohibition: As economies became more dynamic, with real growth possibilities, it became clear that charging interest on business loans where the borrowing merchant prospered, couldn’t be condemned and by 1516 the idea of a lending institution charging interest had been overwhelming accepted.

Calvin’s Reformation; John Calvin finished off the usury ban in 1536. "Calvin deals with usurie as the apothecaire doth with poison" wrote Roger Fenton. He considered usury sinful only if it hurt ones neighbor and that it was generally legitimate in business loans.