Book of Deuteronomy have given various answers to the problem. The Deuteronomistic history theory is currently the most popular (Deuteronomy was originally just the law code and covenant, written to cement the religious reforms of Josiah, and later expanded to stand as the introduction to the full history); but there is an older theory which sees Deuteronomy as belonging to Numbers, and Joshua as a sort of supplement to it. This idea still has supporters, but the mainstream understanding is that Deuteronomy, after becoming the introduction to the history, was later detached from it and included with Genesis-Exodus-Leviticus-Numbers because it already had Moses
Hans Heinrich Schmid Hochschule Bethel). In the summer semester 1976 he was Professor of Old Testament scholarship and general history of religion at the University of Zurich. From 1988 to 2000 he served as rector of the University of Zurich. During his tenure, in 1998, the University of Zurich became an independent legal entity of the Canton of Zurich. Hans Heinrich Schmid was married in 1962 and had two sons and two daughters. Schmid was a respected authority on the question of Pentateuchal origins (the question of how the first five books of the bible – Genesis, Exodus, Leviticus, Book of Numbers and