The Indian Ocean interregional arena is a space of vital economic and strategic importance characterized by specialized flows of capital and labor, skills and services, and ideas and culture. Islam in particular and religiously informed universalism in general once signified cosmopolitanism across this wide realm. This historical reality is at variance with contemporary conceptions of Islam as an illiberal religion that breeds intolerance and terrorism. The future balance of global power will be determined in large measure by policies of key actors in the Indian Ocean and the lands that abut it rather than in the Atlantic or the Pacific. The interplay of multiple and competing universalisms in the Indian Ocean arena is in urgent need of better understanding. Oceanic Islam: Muslim Universalism and European Imperialism is a fresh contribution to Islamic and Indian Ocean studies alike, placing the history of modern South Asia in broader interregional and global contexts. It refines theories of universalism and cosmopolitanism while at the same time drawing on new empirical research. The essays in the volume bring the best academic scholarship on Islam in South Asia and across the Indian Ocean in the age of European empire to the readers.