Consideration on Viewpoints of Nasir al-din Tusi towards Hulaku's Invasion to Iran

By the Mongol invasion, the elites and general public faced with a hard trial including surrender and resistance. As times went by, surrender shifted to resistance. Khwajah Nasir al-din Tusi was one of those elites who assayed during the last guided invasion of the Mongolia’s court.This essay intends to explain and analyze Tusi’s position concerning the Hulaku’s invasion and its argumentation. These questions will be answered in descriptive and analytical method. It theorizes that despite some sources claim, he has not any role in the invasion, but, was effective in the fall of Caliphate, and with his connection with Mongols he could save the Shiites of Baghdad. The severity of Caliph against Shiites and his weak management and vast political corruption in the capital of Islamic world, made Tusi to conclude that collaboration with Mongols can prevent unexpected consequences. Therefore, his limited and conditional collaboration with Mongols was for preventing from destruction of Iran and ravaging of Shiites and scholars. Protection and perpetuation of Islamic culture and civilization owe to discernment and leniency of characters such as Khwajah Nasir al-din Tusi.