 Ezra, Hayes explains, imagined Israel as divinely ordained to remain pure and holy, set apart and without the influence of other nations in Canaan, just as the Priestly division were commanded, by God, to practice marriage exclusivity.In reaction to contemporaries, such as Hayes and Klawans, who argue that Ezra–Nehemiah's purity ideology is a product of conservative "ritual" and "moral" purity, independently; Olyan claims that Ezra–Nehemiah's alien expulsion mandate was a result of a melding ideology taken from the two seemingly independent ideas of, "moral" and "ritual" purity and remains exclusive to the particular narrative of Ezra–Nehemiah.Moral purity has familial implications, which the lack of may cause disruption in the cohesiveness of the family unit.