A comment below prompted me to slap together a post quickly displaying some data which illustrates just how religious South Asians are compared to East Asians. Anyone with an interest in world history will not be surprised by this assertion. When reading surveys of East Asian history I would occasionally reach a chapter titled "Religion," and the author would offer a quick explanation and apologia for why the topic was not given pride of place. By contrast, some have argued to a first approximation South Asian history is a history of South Asian religion. (Though I do not focus on that issue…