 At the meantime the early 7th century evidences the merging of the Arabian tradition of prophecy and the Arabian Monotheist "Rahmanist" tradition which produced "the Arabian prophetic movement".According to Korotayev, the Monotheist "Rahmanist" prophets appear to have represented a supratribal authority just of the type many Arab tribes were looking for at this very time, which seems to explain to a certain extent those prophets' political success (including the extreme political success of Muhammad).Korotayev has written over 35 books and 300 articles dealing with his research interests .