The Sin of Avarice

1. In Tawney’s view, what is the main difference between modern economic thought and the medieval view?
2. How do we determine the “just price” of a thing? What does this concept protect us against?
3. Why was usury so wrong, in practice? Whom did it hurt most? Why did Dante put usurers in the same circle (the 7th) of Hell as the blasphemers and the sodomites?