Critical Approach to Islamic Civilizationperiods in View of Iranian contemporary writers

Islamic civilization as a reality and having an independent identity (civilization as reality) or validity coming from the social life of Muslims (civilization as a situation) is one of the most challenging and deliberative issues in civilization research. From topics related to Islamic civilization, is its historical revolution or vital periods. Some have considered it in the course of history, and some have considered a vital pattern for it and enumerate it of stages such as genesis, growth, flourishing and development, cease and stagnancy, and also degeneration or decline. However, they do not agree on the historical order of stages. The common point among them is acceptance of its flourishing in the fourth century AH. The present article by a critical method and in a comparative way respond to this basic question that what are the advantages and disadvantages of the views expressed about Islamic civilization periods? The result of the research is that most of the existing views had no defensible scientific strength and require a serious and fundamental review because of having ambiguities and combination of conceptual boundaries, the uncertainty of the indicator, undefined historical basis, and also theoretical shortcomings specifically in the interlaced boundary of real or valid existence of civilization. From the perspective of this article, a vital revolution cannot be identified for Islamic civilization, rather it has to be considered in different periods and different lands without being able to indicate an immutable pattern for it.