Either a single preacher or a group of like‐minded teachers in Judah who imposed a theological view with a distinctive oratorical style on the books of the OT, especially from Deuteronomy to 2 Kings which are often called ‘the Deuteronomistic History’, from the death of Moses in Deut. 34 to King Jehoiachin's release from prison in 561 BCE and the reversal of fortune in Babylon (2 Kgs. 25).
The intention was to explain the nation's fate as due to its apostasy from the true worship of God. There was a covenant (Deut. 7: 12) which God for his part would keep, but peace and prosperity for the people depended on their faithfulness. The prophecies of Jeremiah (and some would add many other prophetic collections) seem to have been edited to express the Deuteronomist point of view. The collapse of Judah in 586 BCE and the Exile are interpreted as vindicating Deuteronomy's prophecy of punishment if they were faithless (Jer. 36: 29).