Since the beginning of the 21st century a debate has been underway in the European Union on the future systemic model of this organization and the necessity of implementing indispensable institutional changes that would prepare it to operate in an increasingly globalizing world. The discussion that took place in the years 2000-2002 resulted in launching work by the European Convent, which in June 2003 drafted a bold project of a Constitution for Europe. As a result of opposition from many countries which feared the loss of their sovereignty and especially after referenda in France and Holland at the end of May and beginning of June 2005 the Constitutional Treaty was not enforced. Following a French-German agreement it was modified and given the form of a “reform treaty” (a “simplified” one). Elements that could be associated with the project of the earlier EU Constitution were deleted. However, it is estimated that the Treaty of Lisbon enforced in December 2007 retained about 80% of the substance of the old Constitutional Treaty.