“In the Muslim community, jihad is a religious duty because of the universalism of the Muslim mission and the obligation to convert everybody to Islam either by persuasion or by force.  The other religious groups did not have a universal mission, and the jihad was not a religious duty for them, save only for purposes of defense.  But Islam is under obligation to gain power over other nations.”  Esteemed Muslim philosopher and historian Ibn Khaldun (d. 1406)

Ibn Khaldun