The emergence of post-national citizenships questions the principles and values as well as the rights and responsibilities in which national citizenships were founded. Does this new reality reflect a crisis of classical liberalism and particularly of its neoliberal declination facing the new challenges of globalization and diversity? Multiculturalism, one of the answers to the dilemmas of citizenship and diversity shows signs of crisis. In these context concepts such as cosmopolitan democracies and global citizenship education have been invoked as solutions to the possible demise of the regulatory power of the nation-state and failed citizenship worldwide. The implementation of the Global Education First Initiative (GEFI) in 2012 by the UN Secretary Ban Ki-moon sets a new program for education where Global Citizenship Education is predicated as a resource to enhance global peace, sustainability of the planet, and the defense of global commons.