The Social-IST Support Action aims at catalysing interdisciplinary collaborations and at organising consultations of multidisciplinary research communities on the theme of Social Collective Intelligence. The term is used to denote a class of socio-technical systems that combine, in a coordinated way, the strenghts of humans and groups in terms of competences, knowledge and problem solving capabilities with the communication, computing and storage capabilities of advanced information and communication technologies. Social Collective Intelligence systems have the potential to radically change the way we approach and tackle global societal challenges.The Social-IST project will deliver a White Paper on research challenges in Social Collective Intelligence and a Roadmap document for possible future FET initiatives in the field. The proposed Support Action will leverage on a multidisciplinary Scientific Panel with leading scientists in the respective fields, that will be brought together in two highly interactive workshops. Online consultations will be run to gather inputs from the scientific community at large.The results of the Support Action will be presented in a final public event, that will target high-profile representatives from academia and industry, together with European Commission delegates.