During the 34 years of imamate of as-Sādiq (a.s.) greater possibilities and a more favorable climate existed for him to propagate religious teachings. This came about as a result of revolts in Islamic lands, especially the uprising of the Muswaddah to overthrow the Umayyad caliphate, and the bloody wars which finally led to the fall and extinction of the Umayyads. The greater opportunities for Shi...