I think taxation is right, if I remember correctly.
Like many nomadic pastoral cultures, the Mongols had a segmentary society, originally organized into a hierarchy of families, clans, tribes, and confederations. While social classes including nobility, herders, artisans, and slaves existed, the social structure was not completely rigid and social mobility was possible.
Answer: The Tigris River and the Euphrates River
Church and state were legally separated. A two-party political system was enacted. Jewish men were allowed to serve in the military. Women were granted the right to vote.