One scholar even suggests that “live in your land” Yoshev BeArtzeha, means not those who inhabit, but rather those who “rule”. Those who sit on the throne and seat of power… the “powers that be”. (Tribes of Yahweh: A Sociology of the Religion of Liberated Israel, 1250-1050 BCE, by Norman Gottwald, pp 530-534)
“If yashav is understood as “rule” in these contexts, the heavy emphasis on avoidance of ties with the Canaanites takes on a predominantly political, rather than ethnic, cast. Even the animus against Canaanite gods becomes an animus against the gods of the Canaanite rulers who stand in systematic opposition to Yahweh, the God of the egalitarian Israelite.” Gottwald ibid page 532
Yehezkel Kaufman points out that by the end of Joshua’s life (Joshua13:1-6) “a new conception makes its appearance: “the remaining country”… a region that does not exist in the Land of Canaan of the Pentateuch.
In “the remaining country” a new people is settled: the later Philistines…. Josh 23 contains the first mention of the conception of “the remaining peoples”. Here we meet, for the first time, the warning that, if the Israelites enter into relations with these remaining peoples, Jahweh will no longer (fulfill his promise to) expel them. By the time of the judges (Judges 2:11 – 3:6) the hope of completing the Conquest is entirely abandoned.” (The Biblical Account of the Conquest of Canaan, Yehezkel Kaufman, Magnes Press, Hebrew University 1953 pp 92-93 in chapter entitled “The Problem of the Complete Conquest”)