In recent decades, it has become increasingly common among scholars to assume that much of the Hebrew Bible was assembled, revised and edited in the 5th century BCE to reflect the realities and challenges of the Persian era. The returnees had a particular interest in the history of Israel: the written Torah (the books of Genesis, Exodus, Leviticus, Numbers and Deuteronomy), for example, may have existed in various forms during the Monarchy (the period of the kingdoms of Israel and Judah), but it was in the Second Temple that it was edited and revised into something like its current form, and the Chronicles, a new history written at this time, reflects the concerns of the Persian Yehud in its almost-exclusive focus on Judah and the Temple.