Formerly one of the largest and most militant Islamic organizations in the Middle East, Egypt's al-Gama'ah al-Islamiyah is believed to have played an instrumental role in numerous acts of global terrorism, including the assassination of President Anwar Sadat and the 1993 World Trade Center bombing. In later years, however, the organization issued a surprising renunciation of violence, repudiating its former ideology and replacing it with a shari'ah-based understanding and assessment of the purpose and proper application of jihad.
This key manifesto of modern Islamist thought is...