Sociological, psychological, and anthropological theories about religion generally attempt to explain the origin and function of religion. These theories define what they present as universal characteristics of religious belief and practice.
History From presocratic times, ancient authors advanced prescientific theories about religion. Herodotus (484–425 BCE) saw the gods of Greece as the same as the gods of Egypt. Euhemerus (about 330–264 BCE) regarded gods as excellent historical persons whom admirers eventually came to worship. Scientific theories, inferred and tested by the comparative method, emerged after data from tribes and peoples all over the world became available in the 18th and 19th centuries. Max Müller (1823–1900) has the reputation of having founded the scientific study of religion; he advocated a comparative method that developed into comparative religion. Subsequently, Clifford Geertz (1926–2006) and others questioned the validity of abstracting a general theory of all religions.
Classification Theories of religion can be classified into:
Substantive (or essentialist) theories that focus on the contents of religions and the meaning the contents have for people. This approach asserts that people have faith because beliefs make sense insofar as they hold value and are comprehensible. The theories by Tylor and Frazer (focusing on the explanatory value of religion for its adherents), by Rudolf Otto (focusing on the importance of religious experience, more specifically experiences that are both fascinating and terrifying) and by Mircea Eliade (focusing on the longing for otherworldly perfection, the quest for meaning, and the search for patterns in mythology in various religions) offer examples of substantive theories. Functional theories that focus on the social or psychological functions that religion has for a group or a person. In simple terms, the functional approach sees religion as "performing certain functions for society" Theories by Karl Marx (role of religion in capitalist and pre-capitalist societies), Sigmund Freud (psychological origin of religious beliefs), Émile Durkheim (social function of religions), and the theory by Stark and Bainbridge exemplify functional theories. This approach tends to be static, with the exception of Marx' theory, and unlike e.g. Weber's approach, which treats of the interaction and dynamic processes between religions and the rest of societies. Social relational theories of religion that focus on the nature or social form of the beliefs and practices. Here, Charles Taylor's book The Secular Age is exemplary, as is the work of Clifford Geertz. The approach is expressed in Paul James's argument that religion is a "relatively bounded system of beliefs, symbols and practices that addresses the nature of existence through communion with others and Otherness, lived as both taking in and spiritually transcending socially grounded ontologies of time, space, embodiment and knowing". This avoids the dichotomy between the immanent and transcendental. Other dichotomies according to which theories or descriptions of religions can be classified include:
"insider" versus "outsider" perspectives (roughly corresponding to emic versus etic descriptions) individualist versus social views evolutionist versus relativist views
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