The Comecon was founded in 1949 by the Soviet Union, Bulgaria, Czechoslovakia, Hungary, Poland, and Romania. The primary factors in Comecon's formation appear to have been Joseph Stalin's desire to cooperate and strengthen the international relationships at an economic level with the smaller states of Central Europe, and which were now, increasingly, cut off from their traditional markets and suppliers in the rest of Europe. Czechoslovakia, Hungary, and Poland had remained interested in Marshall aid despite the requirements for a convertible currency and market economies. These requirements, which would inevitably have resulted in stronger economic ties to free European markets than to the Soviet Union, were not acceptable to Stalin, who in July 1947, ordered these communist governments to pull out of the Paris Conference on the European Recovery Programme. This has been described as "the moment of truth" in the post-World War II division of Europe. According to the Soviet view the "Anglo-American bloc" and "American monopolists ... whose interests had nothing in common with those of the European people" had spurned East-West collaboration within the framework agreed within the United Nations, that is, through the Economic Commission for Europe.