National identity plays an increasingly important role in Western, liberal democracies. Thus, national identities are experienced as threatened by immigration and diversity and restrictions on immigration and nation-building policies are being implemented in response. Specifically, it has been suggested that diversity drives down social cohesion and thus the ties that bind people together in stable, democratic welfare states.

This book addresses challenges to stable liberal democratic institutions and to social cohesion resulting from immigration and diversity. Thus, immigration has been considered an important factor in political polarization and political responses and movements. National identity plays a significant role both as something that, according to some, is threatened by diversity and as something to which populist politicians positively appeal in their justification of restrictive immigration policies and efforts towards nation-building. In some cases, political leaders have framed minorities as a threat to the nation state warranting a departure from liberal democratic institutions. This book considers the role of national identity in contemporary societies and in particular its significance for social cohesion. What role does national identity play for political polarization? Do national identities mediate/moderate the impact of diversity on social cohesion, including trust and solidarity? Has identity politics contributed to a politics of resentment and can more inclusive national identities serve to diminish polarization?

In the book, these and other questions about the relation between national identity, belonging and social cohesion are considered by a number of the most prominent scholars in the field.