sentences:  Friedman's dating of J to the time of the divided kingdom - Wellhausen put it in the 10th century BC rather than the 8th - is also novel, but less so than his ordering of the sources.The documentary hypothesis as defined by Wellhausen, having dominated critical thinking on the origin of the Pentateuch, came into increasing question from the late 1960s onwards as alternative models - supplementary and fragmentary rather than the discrete documents of the DH paradigm - were put forward.Friedman's book is thus in one sense an answer to these critics, and perhaps especially to R. N. Whybray, whose 1987 "The Making of the Pentateuch" had concluded that the tools by which the documentary model distinguished its supposed documents were fundamentally faulty