On April 1999, the United Nations Convention on Contracts for the International Sale of Goods (hereinafter: the Vienna Convention, CISG or the Convention)2 celebrated its 19th anniversary. The Convention has been praised throughout the world as a skillful and effective tool for governing international sales transactions. Hence, after more than fifty years of arduous work, the efforts undertaken to unify the law for international sales at a global scale seem, at last, to have reached success. As frequet referrals to former efforts undertaken will be made, it seems appropriate to set forth, at least summarily, the history of the Vienna Convention.