“ At most times, landowners have been debtors, while men engaged in commerce have been creditors. The views of philosophers, with few exceptions, have coincided with the pecuniary interests of their class. ”
 Bertrand Russell, A History of Western Philosophy (1945). copy citation

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“From Greek times to the present day, mankind, or at least the economically more developed portion of them, have been divided into debtors and creditors; debtors have disapproved of interest, and creditors have approved of it. At most times, landowners have been debtors, while men engaged in commerce have been creditors. The views of philosophers, with few exceptions, have coincided with the pecuniary interests of their class. Greek philosophers belonged to, or were employed by, the landowning class; they therefore disapproved of interest. Mediaeval philosophers were churchmen, and the property of the Church was mainly in land; they therefore saw no reason to revise Aristotle’s opinion.” source