My Bible study partner sent me a quote from C.S. Lewis, who worried that the ancient Greeks, the Jews in the Old Testament, and the Christians in the Middle Ages all condemned interest (or usury), and yet this practice of charging interest–of trying to earn a rate of return on an investment–was the foundation of our modern economic system.
I actually discussed this (though not definitively by any stretch) way back in 2006 in a lecture at the Mises Institute. (I read the Lewis quotation around 7:55.) Through this whole video, I’m now thinking, “What jacket was I wearing? I don’t think I have that anymore.”