This article focuses on the way in which Imam ‘Ali (‘a) interacted with the Caliphs after the death of the Prophet (s). Despite having his right usurped, Imam ‘Ali (‘a) willingly offered his assistance and support to the Caliphs in political, economic, military, judicial, and religious matters. His intention was the preservation of the unity and stability of the Islamic Ummah from the dangers of division, disintegration, and destruction.