In this engaging study, Matthew J. Kuiper tells the fascinating story of how Islam became a world religion and cultural phenomenon of immense scale, astonishing diversity and global impact. His starting point is the dramatic upsurge in Islamic missionary activism and widespread Muslim recovery of the classical concept of da'wa ('inviting' to Islam, or Islamic mission) in recent times. Going back to Islam's origins, Kuiper then carefully chronicles 14 centuries of history, from the 7th-century da'was of the Qur'an and the Prophet Muhammad to diverse da'wa initiatives in today's global religious marketplaces. Paying attention to changing contexts, and to themes like the interplay between the religious and the political, Islamic relations with other religions, and the transformations of modernity, he develops a nuanced and original portrait of the past, present and future of Islamic missionary thought and practice.