This is a guest post by Mike Sproul . Mike's last guest post is here . Scott Sumner and I have argued about the backing theory of money (aka the real bills doctrine) quite a bit over the years, starting in 2009 and continuing to the present. ( link 1 , link 2 , link 3 , link 4 , …) Scott rejects the backing theory, while I favor it. I think that printing more money is not inflationary as long as the money is adequately backed, while Scott thinks that printing more money causes inflation even if it is adequately backed. Our discussions in the comments section of his Money Illusion blog extend well over 50 pages, so I’m going to try to condense those 50+ pages into two key points that cover the main arguments that Scott and I have had over the backing theory. (That’s John Law on the right. He was an early proponent of the real bills doctrine, oversaw a 60% increase in French industry in the space of two years, and was the architect of the western world’s first major hyperinflation an...