When news of The Al Qaeda Reader leaked to the press in 2005, some on the left questioned whether the book would be a pseudoscholarly attempt to demonize Muslims. Others on the right worried that unfiltered exposure to the radical beliefs and propaganda of bin Laden and his cohorts might unintentionally lead to more converts or sympathizers.

My reply is simply this: Whatever one's position in regard to the "war on terror," understanding the ideas of our enemy is both a practical necessity in wartime and a fundamental liberal value. It is my hope that both sides in this bitter debate will profit from a deeper acquaintance with these works. In any case, it simply will not do to dismiss Al Qaeda as an irrational movement without ideas.