The Hebtiahs Bohra are a branch of Mustaali Ismaili Shi'a Islam that broke off from the mainstream Dawoodi Bohra after the death of the 39th Da'i al-Mutlaq in 1754. The Atba-i-Malak community are a branch of Mustaali Ismaili Shi'a Islam that broke off from the mainstream Dawoodi Bohra after the death of the 46th Da'i al-Mutlaq, under the leadership of Abdul Hussain Jivaji in 1840. They have further split into two more branches, the Atba-e-Malak Badar and Atba-i-Malak Vakil. The Progressive Dawoodi Bohra is a reformist sect within Mustaali Ismai'li Shi'a Islam that broke off circa 1977. They disagree with mainstream Dawoodi Bohra, as led by the Da'i al-Mutlaq, on doctrinal, economic and social issues.