 The earliest known address of this title is for Ibn Mutahhar Al-Hilli (died 1374), however it was not in use until recent the century.Glassé states that following domination of Twelver branch by followers of "Usuli" school and demise of "Akhbari" school, the title was popularized by "Usuli"s as an attempt to self-aggrandizement for power.Hamid Algar maintains that this title entered general usage possibly because it was an "indirect result of the reform and strengthening of the religious institution in Qom".