Chapter 10 begins by summarising the conclusions from the case studies in terms of the model of ruler conversion, but its main aim is to adopt a global perspective on ruler conversions and on conversion more generally at times. It first underscores how vanishingly rare ruler conversions between Islam and Christianity are in the historical record and yet how open to monotheism immanentist regions, such as the Pacific and, to a lesser extent, Africa have been. Some scholars have already noticed the resilience of Buddhist, Hindu and Confucian societies to the proselytising drives of Christianity and Islam. The chapter summarises why this makes sense in terms of the mechanism of transcendentalist intransigence. It then offers a brief overview of how this affected Eurasian history by reference to the Ottoman, Mughal, Manchu and Mongol empires. The second half of the chapter offers a more detailed appraisal of the fortunes of Christianity and Islam in attempting to secure ruler conversions in South Asia, East Asia and both maritime and mainland Southeast Asia. Even though missionaries developed some of their most sophisticated strategies in these regions, the result was largely a failure. The conclusion to the chapter, and the book, reflects on the role of culture and the question of scale in historical analysis.