Abstract
Abstract The specialist of economic history and thought may find that the events are always intercepted with the mental frames that limit the economic role of the country (state) since the establishment of the so-called state till now. This study is concerned with the study of the state interference in the economic efficiency during in the Islamic Middle age. Two ecologies have been selected in terms of one period. The western environment that has been reckoned to the age called (renaissance era), and the Islamic Arab environment. The Khaldoni Model has been considered according to the economic thought. The study has been founded as a comparison between two ecologies. In the western world, the nation country (state) established which was based on the secular thought. The major role was a comprehensive one for the coincidence of the benefits by businessmen and merchants, with kings and judges. In Islamic era, Ibn Khaldoon presented the role of the country (state) according to the construction, the stages of development, and this sort of relationship with the constructions (civilization). The study concluded that the destruction of architectures is related to the exclusive interference of the state in economic issues. .
