What was a primary motive behind the implementation of sharia in Islamic empires beginning in the 8th century?

A primary motive behind the implementation of sharia in Islamic empires beginning in the 8th century was to establish a unified legal framework that governed both personal conduct and societal norms according to Islamic principles. This allowed for the integration of diverse cultures and communities within the rapidly expanding empires, promoting social order and stability. Additionally, sharia served to legitimize the authority of rulers by aligning governance with divine law, fostering a sense of legitimacy and moral responsibility in leadership.