7.1-26: The war of conquest. Two topics are treated: (1)the command to destroy the original occupants of Canaan (vv.1-3, 6, 17-24); and (2) the command not to worship their gods (vv. 4-5, 7-15, 25-26). The editors join the two themes at v.16
2:This requirement for destruction is anomalous in several ways. Earlier sources contemplate only the expulsion of these groups (Exod. 23.27-33, cf. 34.11). The definition and requirements of the "ban" vary considerably throughout the Bible: total destruction of the people and property (here; 13.15-17; 20.16-17; 1 Sam 15.3); sparing of property (2.34-35; 3.6-7); sparing of women, children, and property (20.10-14).
Finally, other narratives, which seem far more realistic, speak of the failure to carry out the conquest except in very limited areas and the use of conquered populations for labor (Josh. chs. 15-17; Judg. ch1; 3.1-6) These factors suggest that the law of the ban is an anachronistic literary formulation. It first arose centuries after the settlement; it was never implemented because there was no population extant against whom it could be implemented. Its polemic is directed at internal issues in 6th century Judah......