At the height of the crisis, the international monetary system is powerless to reduce theinstability of exchange rates, the imbalance of the current account of balance ofpayments, instability of exchange rates and the development of speculation in financialmarkets the and the asymmetry between net exporters countries and net deficits countries.This thesis, which had the merit of opening new tracks in order to understand thecomplex relationships between global imbalances and the actual system, showed thatthese global imbalances are intrinsically linked to the failures of the internationalmonetary structure. To stop the deterioration of global imbalances, we propose that thesystem turns towards an international system payment with the creation of aninternational currency and a clearing house. This thesis, which reactualizes the KeynesPlan, also includes statutory dispositions for automatically adjusting the external debt tothe capacities payment of countries. Although this reform is a step forward, we don’t hidethe progress that can be done to reduce external imbalances. To increase the efficiencyand sustainability of the international payments system, it is useful to boost thecooperation between central banks, particularly in a context marked by the external debtcrises. In this sense, this thesis shows the opportunities which offered the creation ofregional monetary zones which are integrated in a monetary union international