Introduction: The Five-star Movement from the street to local and national institutions

The special issue is the result of research and analysis concerning the activities of the Five-star Movement (M5s) in the local and national institutions and the process of institutionalisation undergone by this new political entity. Even though the M5s has resisted being transformed into a political party, it is having to face the problems associated with its relative institutionalisation: the selection of personnel; the coordination of activities; decision making. Like many other movements, the M5s has brought a new logic to the institutions and some innovative practices, but has been forced to adapt to the insider’s rules.