In his important new book, Cemil Aydın asserts “the ‘Muslim world,’ as a catchall description of people recognizing themselves as Muslims, has never been more than an illusion.” The idea of the Muslim world, Aydın argues, emerged through an exchange between European imperialists and Muslim intellectuals during the late-nineteenth century, and has enjoyed a cyclical revival post-WWII. What Aydın identifies as “the legacy of imperial racialization of Muslim-ness” was met with “Muslim resistance to this racialized identity,” thereby producing a notion of Muslim civilizational and geopolitical difference distinct from the West.