Ruud KoopmansRuud Koopmans is Director of the Migration, Integration, and Transnationalization research unit at the Wissenschaftszentrum für Sozialforschung Berlin and Professor of Sociology at the Vrije Universiteit Amsterdam. His research focuses on citizenshipand immigration, European integration, social movements and collective action, and evolutionary sociology. He has authored and co-authored ten books, including Democracy from Below, New Social Movements in Western Europe, Challenging Immigration and Ethnic Relations Politics, and Contested Citizenship. He has published in leading journals such as the American Journal of Sociology, the American Sociological Review, the European Journal of Political Research, Evolution and Human Behavior, the Journal of Ethnic and Migration Studies, Mobilization, Social Problems, Theory and Society, and West European Politics. He is a member of the Scientific Advisory Councils of the Institute for German Studies and the Institute for Migration and Ethnic Studies, both in Amsterdam, and in 2004–2005 was an invited Fellow at the Center for Advanced Studies in the Behavioral Sciences at Stanford University. Read More Read Less