R. Murray Thomas asks how Haitians can hold two apparently incompatible worldviews at once, and answers with seven principles of accommodation. Elements of two faiths can sit together when they mean the same thing under different names, when a new belief contradicts nothing already held, when a shared theme is expressed through different rituals, or when believers keep the two in separate compartments of place and time. Each of the nine central chapters takes one aspect of religion, spirits, the creation of the universe, ceremonies, proverbs and tales, sacred objects, sacred sites, religious societies, and traces it first through West African traditions, then through Spanish and French Catholicism, then through the Haitian blend. The evidence is drawn from published scholarship and reference works rather than from fieldwork. A closing chapter predicts that Protestant recruitment will erode this combined faith faster than movements inside Vodou can strip the Catholic elements out of it.