Jacquelien van Stekelenburg is Professor of Social Change and Conflict at Vrije Universiteit Amsterdam, the Netherlands. With a background in social psychology, she combines a social psychological approach with sociological insights. She has conducted studies on demonstrations, emerging networks, and the micro-foundations of out-migration and mass protests. Her research primarily focuses on moderate and radical protest.
Bert Klandermans is Professor of Applied Social Psychology at Vrije Universiteit Amsterdam, the Netherlands. He has published extensively on the social psychology of protest, including the classic work The Social Psychology of Protest (1997). In 2009 he received a royal decoration in the Netherlands for his efforts to link science and society. He has also received awards for his contributions to political psychology and sociology of collective behavior and social movements, as well as a prestigious advanced investigator grant from the European Research Council.