In this lecture, Lebanese thinker Radwan ElSayed dealt with the most important intellectual aspects relating to leaders of contemporary Islamic movements, pointing out that these movements derive their political thoughts from the writings of Ibn Taimiyya, particularly his book Al-Fatawa Al-Kubra. The misunderstanding on the part of leaders of Islamic movements led them to believe that the rules applied to Muslims today are not Islamic rules. Therefore, they call for jihad, which they describe as the “neglected duty.” The references used by many political Islamic movements ignore the historical and political context in which the fatwas of Ibn Taimiyya were made. The speaker attributed the politicization of political Islamic movements today to social, economic and political crises in Muslim societies, which explain the popularity of these movements. He pointed out that this politicization appeared in the writing of Sayyid Qutb, Rached Ghannouchi and other leaders of political Islamic movements, particularly in Iran and the Sudan.