Brian Herbert called the "Dune" universe "a spiritual melting pot", noting that his father incorporated elements of a variety of religions, including Buddhism, Sufi mysticism and other Islamic belief systems, Catholicism, Protestantism, Judaism, and Hinduism. He added that Frank Herbert's fictional future in which "religious beliefs have combined into interesting forms" represents the author's solution to eliminating arguments between religions, each of which claim to have "the one and only revelation." Frank Herbert writes that, in the aftermath of the technology-purging Butlerian Jihad, the Bene Gesserit composed the Azhar Book, which "preserves the great secrets of the most ancient faiths". Soon after, an ecumenical council created a syncretic religion defined by the Orange Catholic Bible, which would become the primary orthodox religious text in the universe. Its title suggests a merging of Protestantism (Orange Order) and Catholicism. Herbert writes in the glossary of "Dune":