Abstract
[ http://www.cairn.info/revue-cahiers-d-economie-politique-2011-1-page-45.htm ] Pierre-Joseph Proudhon's ideas on credit and money have been considered to be not very relevant and above all unrealistic. However, they have known an uncommon posterity. They influenced Silvio Gesell who is John Maynard Keynes's reference. This article analyses Pierre-Joseph Proudhon's exchange bank plan. We show that Pierre- Joseph Proudhon's ideas on credit and money are opened to criticism but require a reexamination because we can draw many lessons from them.