This splendid book has something for everyone. For religious conservatives who question the separation of church and state, Vallier offers compelling arguments against their integration, drawing from Catholic theology, Church history, and considerations of social stability. For liberals, Vallier offers a bracing view of a powerful current stream of anti-liberal thought that should shatter any complacency about taking liberal political assumptions for granted. For people of all religious and political orientations, Vallier offers a rigorous method for assessing political proposals that does not presuppose liberal principles, but can serve as a basis for all to engage each other in serious discussion. In our politically polarized age, that is a major achievement." Elizabeth Anderson, Max Shaye Professor of Public Philosophy, University of Michigan