Modern scholars agree that separate sources and multiple authors underlie the
Pentateuch, but there is much disagreement on how these sources were used to write the first five books of the Bible. This
documentary hypothesis dominated much of the 20th century, but the 20th-century consensus surrounding this hypothesis has now been broken down. Those who uphold it now tend to do so in a highly modified form, giving a much larger role to the redactors (editors), who are now seen as adding much material of their own rather than as simply passive combiners of documents. Among those who reject the documentary approach altogether, the most significant revisions have been to combine E with J as a single source, and to see the Priestly source as a series of editorial revisions to that text. The alternatives to the documentary approach can be broadly divided between "fragmentary" and "supplementary" theories. Fragmentary hypotheses, seen notably in the work of Rolf Rendtorff and Erhard Blum, see the Pentateuch as growing through the gradual accretion of material into larger and larger blocks before being joined, first by a Deuteronomic writer, and then by a Priestly writer (6th/5th century BCE), who also added his own material. The "supplementary" approach is exemplified in the work of
John Van Seters, who places the composition of J (which he, unlike the "fragmentists", sees as a complete document) in the 6th century as an introduction to the
Deuteronomistic history (the history of Israel that takes up the series of books from
Joshua to
Kings). The Priestly writers later added their supplements to this, and these expansions continued to the end of the 4th century BCE. == Characteristics, date and scope ==