A great deal of attention has been given over the past several years to the question: What is secularism? In On Diaspora, Daniel Barber provides an intervention into this debate by arguing that a theory of secularism cannot be divorced from theories of religion, Christianity, and even being. Accordingly, Barber's argument ranges across matters proper to philosophy, religious studies, cultural studies, theology, and anthropology. It is able to do so in a coherent manner as a result of its...