Religion, like any other domain of culture, is mediated through symbolic forms and communicative behaviors, which allow the coordination of group conduct in ritual and the representation of the divine or of tradition as an intersubjective reality. While many traditions hold out the promise of immediate access to the divine, or to some transcendent dimension of experience, such promises depend for their realization as well on the possibility of mediation, which is necessarily conducted through channels of communication and exchange, such as prayers or sacrifices. An understanding of such modes...