"The SOCIALCATH research project deals with the intercultural connection between Socialism and Catholicism in two cases in which this meeting was very evident: the French ""Parti Socialiste Unifié"" (PSU) and the Italian ""Partito Socialista Italiano di Unità Proletaria"" (PSIUP).PSU and PSIUP put together Socialists and Catholics who did not accept the main strategy of their respective political families. PSU and PSIUP wanted represent a radically democratic form of modernity, giving great attention to social ferments and to defend all discriminated or under-represented categories: workers, women and young people. PSU and PSIUP were libertarian and they refused the hierarchical structures of a mass party, adopting a fluid organisation totally open to different cultural models.The political relationship between PSU and PSIUP, their ideological exchanges and the contacts between their members have never been explored within a scientific context. The SOCIALCATH project aims to fill this scientific gap, bringing to light many unedited documents. The interdisciplinary approach, the multi-methodological analysis and the comparative nature of the SOCIALCATH project are all new instruments to be used in these arguments.The SOCIALCATH project aims to reach three main objectives:1. to describe the meeting between opposite cultural areas such as Socialism and Catholicism, in order to support the policies for intercultural dialogue promoted by the EU and other international organisations such as UNESCO.2. to highlight alternative aspects of Socialist and Catholic cultures, in order to discover the anti-dogmatic spirit of the 60s and its today's inheritance in the collective European conscience.3. to explore the relationship between the PSU and PSIUP's political class and the new social issues of the 60s (feminism, ""the young"" issue, etc.), in order to compare those events with the present attitude of the European leading class towards society and collective issues."