Will immigration undermine the welfare state? Trust beyond Borders draws on public opinion data and case studies of Germany, Sweden, and the United States to document the influence of immigration and diversity on trust, reciprocity, and public support for welfare programs. Markus M. L. Crepaz demonstrates that we are, at least in some cases, capable of trusting beyond borders: of expressing faith in our fellow humans and extending help without regard for political classifications.

In Europe, the welfare state developed under conditions of relative homogeneity that fostered high...