In 2019, Islamic State lost its last remaining sliver of territory in Syria, and its Caliph, Abu Bakr al-Baghdadi, was killed. These setbacks seemed to herald the Caliphate's death knell, and many now forecast its imminent demise. Yet its affiliates endure, particularly in Africa: nearly all of Islamic State's cells on the continent have reaffirmed their allegiance, attacks have continued in its name, many groups have been reinvigorated, and a new...