Over the last hundred years different attempts have been made to explain why sacrifices have had such a prominent place within many religious traditions. Such theories of sacrifice are sometimes part of a more general theory of (religious) rituals, or a theory of religion in general. In most cases, actual sacrifices are thus explained through recourse to their position within a more general category. The opposite is, however, sometimes the case, i.e. a theory of one sacrificial tradition is extended to cover all sacrifices, or even ritual in general. The aim of the following discussion is to delineate some central issues that are important for the analysis of the references to breath in the Vedic correspondences. First of all, a working def...