The historical migration and religious development in Rakhine (Arakan) up to the end of the second decade of the 21st century is complicated. This region was a crossroads for South and Southeast Asian civilizations and existed at the overlap of the frontiers of Islam and Theravada Buddhism. Existing in an ecological niche with a difficult topography and climate and a low population base, Rakhine social and state formation was built around inclusivity and tolerance. Although for much of its history the dominant religions of the population of the region were animism and then Brahmanism, successive waves of immigrants from both Bengal and Myanmar meant that Islamic and Theravada Buddhist influence was very strong. The early modern kingdom that emerged at Mrauk-U, its main political center, was built on maritime connectivity with the Indian Ocean world and developed a court culture that was both Muslim and Buddhist and ruled over a population that was religiously heterogeneous. Toleration was challenged, however, by the conquest of Rakhine by Myanmar in 1785 and efforts to eradicate local religious autonomy. Things did not improve under British rule after the British annexation of 1826. The Myanmar and British rulers of Rakhine politicized the region’s history and tried to retell the history of the region in ways that excluded some populations and included others, leading to efforts to force the Rohingya out of Rakhine from August 2017.