Mario Barcelona. He has carried out his career in the chair of private law at the University of Catania. His works tend to flee from positivist frameworks to delve, with philosophical depth, into the evolution of social systems and thought. In this sense, the following stand out: Diritto, Sistema e Senso. Lineamenti di una teoria (1996), Critica del nihilismo giuridico (2006), L’interventismo Europeo e la sovranità del mercato (2011) and two subsequent developments of this book: Dove va la democrazia. Scenari della crisi (2018) and Le Belle bandiere e il colore perduto del PD (2019).