Introduction The Al-Gama'a Al-Islamiyya organization, which perpetrated terror attacks in Egypt throughout the 1980s and '90s, has in recent years undergone an ideological reversal exceptional among Islamist organizations. The leaders of the organization have undertaken to forsake violence and have apologized for past attacks and now promote a new ideology of coexistence with the regime. In addition, they have gone to great lengths to argue against Al-Qaeda's ideology and to restrict its influence on Muslims. The Al-Gama'a Al-Islamiyya leadership's ideological reversal is an outstanding example of a collective shift away from violence by leaders of a prominent radical Islamist organization....