Ulrich Wagner is Professor of Social Psychology and Director of the Center for Conflict Studies at Philipps-University Marburg, Germany.

Linda R. Tropp is Associate Professor of Psychology and Director of the Psychology of Peace and Violence Concentration at the University of Massachusetts Amherst, United States.

Gillian Finchilescu is Professor and Chair of Psychology at the University of the Witwatersrand, South Africa.

Colin Tredoux is Professor of Psychology, and Head of Department, at the University of Cape Town, South Africa.