The Buyids were initially Zaydī Shias, as were the Banu Ukhaidhir rulers of al-Yamama in the 9th and 10th centuries. The leader of the Zaydī community took the title of caliph; thus, the ruler of Yemen was known by this title. Al-Hadi Yahya bin al-Hussain bin al-Qasim ar-Rassi, a descendant of Ḥasan ibn ʿAlī, founded the Zaydī Imamate at Sa'dah in 893–897 CE, and the Rassid dynasty continued to rule over Yemen until the middle of the 20th century, when the republican revolution of 1962 deposed the last Zaydī Imam. (See: Arab Cold War). The founding Zaydī branch in Yemen was the Jarudiyya; however, with increasing interaction with the Ḥanafī and Shāfiʿī schools of Sunnī jurisprudence, there was a shift from the Jarudiyya group to the Sulaimaniyya, Tabiriyya, Butriyya, and Salihiyya.Article by Sayyid Ali ibn ' Ali Al-Zaidi, At-tarikh as-saghir 'an ash-shia al-yamaniyeen (Arabic: التاريخ الصغير عن الشيعة اليمنيين, A short History of the Yemenite Shiʻites), 2005 Zaydī Shias form the second dominant religious group in Yemen. Currently, they constitute about 40–45% of the population in Yemen; Jaʿfaris and Ismāʿīlīs constitute the 2–5%. In Saudi Arabia, it is estimated that there are over 1 million Zaydī Shias, primarily based in the western provinces.
The Buyids were initially Zaydī Shias, as were the Banu Ukhaidhir rulers of al-Yamama in the 9th and 10th centuries. The leader of the Zaydī community took the title of caliph; thus, the ruler of Yemen was known by this title. Al-Hadi Yahya bin al-Hussain bin al-Qasim ar-Rassi, a descendant of Ḥasan ibn ʿAlī, founded the Zaydī Imamate at Sa'dah in 893–897 CE, and the Rassid dynasty continued to rule over Yemen until the middle of the 20th century, when the republican revolution of 1962 deposed the last Zaydī Imam. (See: Arab Cold War). The founding Zaydī branch in Yemen was the Jarudiyya; however, with increasing interaction with the Ḥanafī and Shāfiʿī schools of Sunnī jurisprudence, there was a shift from the Jarudiyya group to the Sulaimaniyya, Tabiriyya, Butriyya, and Salihiyya.Article by Sayyid Ali ibn ' Ali Al-Zaidi, At-tarikh as-saghir 'an ash-shia al-yamaniyeen (Arabic: التاريخ الصغير عن الشيعة اليمنيين, A short History of the Yemenite Shiʻites), 2005 Zaydī Shias form the second dominant religious group in Yemen. Currently, they constitute about 40–45% of the population in Yemen; Jaʿfaris and Ismāʿīlīs constitute the 2–5%. In Saudi Arabia, it is estimated that there are over 1 million Zaydī Shias, primarily based in the western provinces.