...ured well into the twentieth century. It was entrenched in the legal systems of the Ottoman Empire and of Czarist Russia. Elements of feudalism surv... ...ce, or many Native American tribes, and royal families everywhere. In the Ptolemaic dynasty, blood relatives married routinely. Cleopatra’s first h... ...and Russia recognized the East-West divide. The implosion of the four empires - the Ottoman, Habsburg, Hohenzollern and Romanov - following the fir...