Assaad Azzi is Professor of Psychology and Director of the Social Psychology unit at the Université Libre de Bruxelles. His research focuses on identity, resource-distribution, and the perception of justice and injustice in majority-minority relations.

Xenia Chryssochoou is Associate Professor at Panteion University, Athens. She currently works on mobility, migration and justice and on perceptions of globalization and political participation.

Bert Klandermans is Professor in Applied Social Psychology at the VU-University, Amsterdam, The Netherlands. He is co-editor (with Suzanne Staggenborg, 2002) of Social Movements, Protest, and Contention and co-author, most recently, of the Handbook of Social Movements Across Disciplines (with Conny Roggeband, 2007).

Bernd Simon is Professor of Social and Political Psychology and one of the Directors of the Institute of Psychology at the Christian-Albrechts-University in Kiel, Germany. His research investigates inter- and intragroup processes.