This paper tries to investigate the association between effectiveness and legitimacy in different political systems, applying a documentary method. To do so, firstly the notion of effectiveness is introduced followed by the notion of legitimacy and then their asso-cnnnnnnn n eeeeeeeeee Snnce eee iiiiiical iirrraeeee ff eeeeeee effeciieeeess ss ccacce, iiis term was defined through its opposite terms like ineffectiveness and crisis. The legiti-macy of political systems in this paper contains different types of legitimacy including divine, popular and combined legitimacy. The paper concludes that the main problem of the states is not the challenges to legitimacy and effectiveness but the real challenge is to draw the trajectory of goals and limitations in policy making and decision making.
