One of the main contributions of the Brotherhood to the political-social Islamic revival of these last generations was the development of the concept of the western “crusader” cultural threat to the Muslim world. According to this concept, the Muslim world is under siege and is facing an existential threat which can only be solved with the reestablishment of the greater Islamic state founded on the principles of exclusively Sharia rule. The Muslim Brotherhood developed an integrated approach, where the strategic conflict for the reestablishment of the Islamic state in all or most of the territory that was under Islamic rule over the course of history, is combined with self-defense in face of the war waged against Islam by the western culture and its champions. This self-defense is an uncompromising Jihad against the enemy, a war for all intents and purposes and by any means. It starts by introducing the centrality of Islam in Muslim society through advocacy, education and culture, and moves to the Jihad - either organized as a war, or as what Western political culture define as terrorism.