information:classification
Legacy

After Al-Mustansir Billah, his sons Nizar and Al-Musta'li both claimed the right to rule, leading to a split into the Nizari and Musta'li factions respectively. Nizar's successors eventually came to be known as the Aga Khan, while Musta'li's followers eventually came to be called the Dawoodi bohra.

The Fatimid dynasty continued and flourished under Al-Musta'li until Al-Amir bi-Ahkami'l-Lah 's death in 1130. Leadership was then contested between At-Tayyib Abu'l-Qasim, Al-Amir's two-year-old son, and Al-Hafiz, Al-Amir's cousin whose supporters (Hafizi) claimed Al-Amir died without an heir. The supporters of At-Tayyib became the Tayyibi Isma'ilis. At-Tayyib's claim to the imamate was endorsed by Arwa al-Sulayhi, Queen of Yemen. In 1084, Al-Mustansir had Arwa designated a hujjah (a holy, pious lady), the highest rank in the Yemeni Da'wah. Under Arwa, the Da'i al-Balagh (the imam's local representative) Lamak ibn Malik and then Yahya ibn Lamak worked for the cause of the Fatimids. After At-Tayyib's disappearance, Arwa named Dhu'ayb bin Musa the first Da'i al-Mutlaq with full authority over Tayyibi religious matters. Tayyibi Isma'ili missionaries (in about 1067 AD (460 AH)) spread their religion to India, leading to the development of various Isma'ili communities, most notably the Alavi, Dawoodi, and Sulaymani Bohras. Syedi Nuruddin went to Dongaon to look after southern India and Syedi Fakhruddin went to East Rajasthan.