In addition to the foreword, introduction and afterword,[18] the book is divided into six main parts that cover the three main "waves of unity" of recorded Arab history with each taking about the same number of pages. The first wave (900 BC to AD 630) contains parts on "Emergence" and "Revolution", the second (630 to 1350) contains "Dominance" and "Decline, and the third (1350 to now) covers "Eclipse" and "Re-emergence".[19]