In any large jihadi group there might be a few people who specialize in composing or memorizing poems. These poets can be anyone from within the movement, men or women of any rank. The Islamic State’s most famous poet is a Syrian woman in her 20s who goes by the name Ahlam al-Nasr, or Dreams of Victory. (While jihadi women generally socialize separately from men, the Internet has allowed women to take a more active part in the movement’s cultural life.) Her most famous collection, “Blaze of Truth,” contains lines such as “Shake the throne of the cross, and Extinguish the fire of the Zoroastrians / Strike down every adversity, and go reap those heads.”