During the nineteenth and twentieth centuries religion continued to play an obvious role in the Middle East. Among observers of that area the significance of the impact of religion on political development was consequently never minimized to the extent that it was among observers of political trends in the West. Western scholars interested in the Middle East, however, have tended to overrate the importance of the Muslim modernists with whom they felt a certain affinity. They also have accepted too uncritically the views of modernists concerning the lifelessness of traditional expressions of Islam. As a result, not until recently have we begun sufficiently to appreciate traditional Muslim religious leaders both for their impact on and for the diversity of their responses to modern political and intellectual currents. I believe that this diversity is not accidental but rather is susceptible to analysis and explanation. This essay demonstrates how four variables (historical circumstances, theological considerations, socioeconomic considerations, and governmental policies toward Muslim religious leaders) affected the political involvement of the Islamic ulama throughout the Middle East generally and in Tunisia particularly during the ‘liberal age’.