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 Economic Writings of Sir William Petty The Economic Writings of Sir William Petty The Economic Writings of Sir William Petty is a book with texts, written by William Petty (1623-1687), and published in 1899 by Charles Henry Hull (1864-1936), in two volumes. The "Economic Writings" were published together with an introduction about the life and work of William Petty, and did also contain "Natural and Political Observations upon the Bills of Mortality," by John Graunt. This edition of the economic texts of William Petty, the scientist, who is often been called the founder of political economy, is used as a reference work ever since its publication.