First of all, the theoretical approaches to the problems of monetary systems of Silvio Gesell, John Maynard Keynes and Irving Fisher will be analyzed. Furthermore, a critical acclaim will be subjected by discussing the advantages and disadvantages of these reforms. Finally, the theories of the three economists will be compared in order to define similarities and differences. In the second main part, this thesis aims out exploring alternative monetary systems which have been implemented into practice. In the course of this analysis two historical case studies as well as seven current ones will be described and evaluated. The historical alternative monetary systems are based on Gesell's approach and the current systems represent complementary currency systems. The aim of this evaluation is to identify if alternative monetary systems can offer an added value for the economy and society. In the last chapter, this paper also aims out exploring if a global alternative monetary system could be established.
In conclusion, it can be said that all three economists developed alternative monetary systems which could have been very effective at that time. Nowadays, an adaptation of these systems is needed by changing them to complementary currencies instead of replacing the official currencies or by guaranteeing the preservation of national sovereignty e.g. In addition, complementary currency systems can be very successful by stimulating the local economy]]>