This volume consists of 12 essays published by the author between the years 1997-2007, a thirteenth paper read at a conference in 2006, and a long introduction prepared specifically for the collection. All of the essays deal with epistemological issues attendant on conceptualizing and defining religion, understanding what is likely to be involved in studying and discussing beliefs, and attempting to explain religion and religions by drawing on the contemporary cognitive and evolutionary sciences. The problem of how best to understand and represent the cultural sensitivities of others is addressed by considering the works of three predecessors, Edward Burnett Tylor, Lucien Lévy-Bruhl, and A. Irving Hallowell.