Social justice in multicultural societies / David Miller -- Ethnicity, trust, and the welfare state / Stuart N. Soroka, Richard Johnston and Keith Banting -- Comments on Miller and Soroka, Johnston & Banting / Anne Phillips -- Questions for Miller and Soroka, Johnston & Banting / Andreas Follesdal -- Solidarity in heterogeneous communities / Eliana La Ferrara -- The co-evolution of love and hate / Samuel Bowles and Jung-Kyoo Choi -- Questions for La Ferrara and Bowles & Choi / Ingrid Robeyns -- Institutional design, cultural diversity and economic solidarity : a comparison of South Africa, Brazil and Nigeria / Jeremy Seekings -- Class and nation / Yael Tamir -- Comments on Seekings and Tamir / Fábio D. Waltenberg -- Questions for Seekings and Tamir / Serena Olsaretti -- Language policy and civil war / David D. Laitin -- On the costs of cultural diversity / François Grin -- Comments on Laitin and Grin / Jean Laponce -- Questions for Laitin and Grin / Rob Reich -- Linguistic pluralism as a serious challenge to democratic life / Dominique Schnapper -- Do multiculturalism policies erode the welfare state? / Keith Banting and Will Kymlicka -- Comments on Schnapper and Banting & Kymlicka / Justine Lacroix -- Questions for Schnapper and Banting & Kymlicka / Neus Torbisco Casals -- Between Mill and Hallstein : cultural diversity as a challenge to European integration / Peter A. Kraus -- Cultural diversity, European integration and the welfare state / Ugo Pagano -- Comments on Kraus and Pagano / Patrick Savidan -- Questions for Kraus and Pagano / Dario Castiglione -- Concluding reflections / Will Kymlicka -- What did we learn? / Brian Barry -- Cultural diversity against economic solidarity? / Philippe Van Parijs.