Ancient Iranian religion was strongly connected. Beginning in the early 10th-century BC, the ancient Iranian religion was gradually displaced by Zoroastrianism, which contains many essential aspects of its predecessor. The sources on ancient Iranian religion, though limited, consist of textual and material sources. The textual sources are both Iranian and non-Iranian. An important Iranian source is the Avesta, which are Zoroastrian sacred scriptures made in the Avestan. This is considered the principal source of knowledge on ancient Iranian religions. It is a collection of several texts that seems to have been over a large span of time by a variety of authors. These
The Religion of the Future cooperation and love. Reviewing "The Religion of the Future" in the "Journal of the American Academy of Religion", Andrew B. Irvine wrote that “the book demands to be read not as a contribution to scholarly debate but as a direct intervention in the most important and urgent issues of today … No review could cover all the angles from which this book deserves to be appreciated—and criticized.” Irvine contends that Unger’s argument “dramatically ...simplifies the indefinitely complex data of religion, but it does so in the name of a single religious perspective.” Irvine asks: “What would this book look like