How did the Fatimids use missionaries to spread Ismaili teachings?

The Fatimid dynasty utilized a sophisticated and secretive network of missionaries and agents, known as the daʿwah, to spread Ismaili teachings and advance their political cause. This mission functioned as a third branch of the Fatimid government, operating under the supreme direction of a chief missionary based in Cairo.1

The mission served several key functions:

• Dissemination of Doctrine: Missionaries were responsible for formulating and teaching Ismaili theology, which provided the intellectual framework to challenge the legitimacy of the Abbasid caliphs and assert the Fatimid claim to the caliphate.1
• Recruitment and Subversion: Agents worked within lands under Abbasid control to gain converts and recruit supporters for the Fatimid cause, often engaging in subversion against the existing Sunni political and religious order.1
• Institutional Training: The Fatimids established great libraries and colleges, such as Al-Azhar, to train missionaries for field work and provide advanced instruction to converts brought to Cairo.12
• Communication: The daʿwah relied on traveling operatives and a network of local cells, which allowed for rapid communication across vast distances, effectively tying together different regions of the Islamic world.13