God's successor

The book explains the extent of the religious overlap with politics in the position of the "Caliphate" and the growth of that overlap with the succession of the Islamic eras from the first caliphate era passing through the Umayyad era and then the Abbasid era, which reached in historical stages to the point of considering that the head of power is the "Khalifa of God" who acts and decides with a divine mandate. In a remarkable convergence with the idea of ​​the infallible imamate in the Shiite community, and the resulting struggle with Sharia scholars who reject the dominance of the political authority over the reference of the Sharia rule