Muhammad al-Baqir
In contrast to his predecessors, Muhammad al-Baqir focused on academic Islamic scholarship in Medina, where he promulgated his teachings to many Muslims, both Shia and non-Shia, in an extremely organized form of Daʿwah. In fact, the earliest text of the Ismaili school of thought is said to be the "Umm al-kitab" (The Archetypal Book), a conversation between Muhammad al-Baqir and three of his disciples.