Donatella della Porta is Professor of Political Science, Dean of the Faculty of Political and Social Sciences and Director of the PhD programme in Political Science and Sociology at the Scuola Normale Superiore, where she also leads the Center on Social Movement Studies (Cosmos). Lorenzo Cini is Research Fellow in the Faculty of Political and Social Sciences at the Scuola Normale Superiore, and a research member of Cosmos. Cesar Guzmn-Concha is Marie Curie Fellow at the University of Geneva. He has worked and collaborated with universities in Spain, Germany, Italy, The Netherlands and Chile.