The debates of Imam Reza after settling in Iran with the followers of religions and sects in the direction of the expansion of Shiism

Shiism is the natural born of Islam and represents the pure Islamic thought. The core of the Shiites were among the great and prominent companions of the Prophet of Islam, who believed in the necessity of the leadership of Ali bin Abi Talib (a.s.) after the Prophet (s.a.w.) after the death of the beloved Islamic prophet and the formation of the Saqeefah and the situation that occurred in the election of the caliph. Historically, Shiism took a different path, and despite being in the minority, Shiites followed the leadership of Ali (AS) and stayed with the Ahl al-Bayt (AS) and gave up their faith by enduring all the difficulties and problems. They didn't take it. After this period, even though Shia was under pressure in every way. It continued to grow under the leadership of Imams (AS) and spread to different parts of the Islamic world. During the period of Imam Reza (a.s.) considering that Imam Hammam had found relative freedom after a difficult and suffocating period during his father's time; He was able to organize the Ahl al-Bayt school. With the arrival of Hazrat Reza (AS) in Iran, the geography of Shiism changed and Iran became one of the centers of Shiite education. Imam (a.s.) spread knowledge with his presence and the Shia religion was established as one of the most important Islamic religions. His emigration to Iran was one of the effective factors in deepening and expanding the school of Ahl al-Bayt (a.s.) and his activities and actions in Iran, considering the existing situation of that time, are remarkable and significant, and the most important activity Hazrat's actions in the field of deepening and expanding Shiism are: 1) holding debate sessions. 2) Education of students. 3) Confronting sects and deviant movements and the presence of His Holiness in a political position. 4) Expanding the culture of Ahl al-Bayt (AS) and deepening Shiite beliefs. In separate sections of this research, these debates and activities of the Prophet and their impact on the deepening and expansion of Shiism will be discussed.