On December 9, 2019, the Faculty of Economics and the Department of Economics and Business Sciences at Guglielmo Marconi University, in collaboration with the Faculties of Jurisprudence and Political Sciences and the Department of Juridical and Political Sciences, organized a very interesting debate on the European Union. The focus of the debate concerned the elements and issues that impede the cohesive functioning and consolidation of the European Union – “the united states of Europe”. The event held in the Aula Magna at Guglielmo Marconi University, was an important occasion to discuss the recent works of Professor Dario Velo and of the General Pasquale Preziosa. The conference focused on the economic and defense models adopted by Europe. The first, significantly affects the values of freedom, solidarity and subsidiarity and aims to address the social market economy of European countries; the second aims at creating a European defense model and at supporting research, development and innovation, guarantees security and stability in a global context that is characterized by continuous and profound changes.