The Role of Farmers in Historical Changes of Middle Ages of Iran.

In Sasani era, Iran had a classified system which had a main role in the ups and downs of the empire. One of the important questions during the perioud of the fall of Sasanis was the position that these classes took against the Moslem Arabs. The reflection of the social groups of the Iranians in the conquest and victory of Moslems, the presence and staying and organization and stablization of Islamic government, has an important role and place. Among these classes and groups, the role and importance of the farmers which were from the lords of the second class who were called (Kazkkhodayan) (Kadkhodayan) (dihkanan or the chiefs of the village) is important. The farmers had the role of an intermediotor between government and people. They welcomed the new conquerors to keep up their state and office. Also the need of the new rulers to their collaboration caused them to be immediately amongst their agents. By the entering of Islam not only this group never lost anything but also by the acceptance of Islam and their previous responsibilities they stabilized their state and even promote it. The farmers were one of the most important social groups in Sasani era which were appeared in different roles. In the place of the local chiefs of the villages, the tax collector officials helped and accompanied the Arabs in the process of their presence and stabilization of their rule on Iran and their role in concluding the treaty of ……., guiding and helping the conquerors of the cities, collecting the taxes and tributets, taking the bussineses and administrative positions in hand and forming the organs and the methods of managing the country was very outstanding. The key words: Sasani Government, Social groups Moslem Arabs, The first Islamic centuries of Iran, The farmers, The conquests, The successors, Omavi