'A gem; no other study provides such a creative, sophisticated and theoretically wide-range analysis of the near demise of irredentism in Europe after World War II ... Markus Kornprobst not only sets a standard for explaining broad changes in international practices, but also suggests a synthesis between constructivism and rational choice that is likely to become a signpost for future research in International relations.' Emmanuel Adler, University of Toronto 'Irredentism in European Politics makes an important contribution to the study of argumentation and normative change in politics. It develops an innovative three-stage norm selection mechanism and a useful way of conceptualizing arguments and their effects on norm development.' Frank Schimmelfennig, Swiss Federal Institute of Technology 'International relations scholars owe thanks to Kornprobst for deepening our understanding of how creative agents draw from incipient and existing cultural resources to lay down the tracks of international action in more peaceful directions.' Michael Barnett, University of Minnesota