If this was Artaxerxes I (465–424 BC), then Ezra arrived in 458 and Nehemiah in 445 BC. Nehemiah 8–9, in which the two (possibly by editorial error) appear together, supports this scenario. In 1890, however, it was proposed that Ezra's Artaxerxes was Artaxerxes II, and that the sequence should be reversed, with Nehemiah arriving in 445 and Ezra in 398 BC. The argument has some persuasive evidence; for example: Nehemiah's mission is to rebuild the walls of Jerusalem, and Ezra 9:9 notes that Ezra found the walls in place when he arrived, and while Nehemiah lists the returnees who came back with Zerubbabel he seems to know nothing about the 5,000 or so who accompanied Ezra. Nevertheless, there are counter-arguments to each of these and other arguments, and the 398 date has not replaced the traditional one. A proposal that the reference to the "seventh year" of Artaxerxes (Ezra 7:7–8) should be read as "thirty-seventh year", putting Ezra's return in 428 BC, has not won support. Hayes, in her article on impurity in Ancient Jewish society, states that it is commonly misconceived that the expulsion of the Gentile wives was a result of Judaean exceptionalism and nationalism. Hayes points out that the theory is not correct arguing that the root cause is largely a fundamental and core belief found within the religious laws of the Judaeans. 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. Transgressing Israelite moral structure was feared to cause violations of the commandments, which ordained by God, must be followed to maintain ethnical identity.