On Religions
Most fantasy worlds include some sort of religious belief. It’s such an ingrained part of real-world culture that it can be very hard to conceive of a world without some kind of spiritual element. Some authors use the opportunity to explore aspects of belief that are difficult to address in contemporary fiction, since real religions carry so much historical baggage. Some throw in as many different forms of worship as they can, for depth or to create conflict between groups. Occasionally a fantasy world has no religion at all (like Anne McCaffrey’s Pern series).