This theory began in the 18th century with the goal of recognizing the relative degrees of civility in different societies,[2] but this concept of a ranking order has since fallen into disrepute in many contemporary cultures.
A number of fundamental aspects are unresolved: Religious traditions fall into super-groups in comparative religion, arranged by historical origin and mutual influence.
[55][56] In 1838, the four-way division of Christianity, Judaism, Mahommedanism (archaic terminology for Islam) and paganism was multiplied considerably by Josiah Conder's Analytical and Comparative View of All Religions Now Extant among Mankind.
Conder's work still adhered to the four-way classification, but in his eye for detail he puts together much historical work to create something resembling the modern Western image: he includes Druze, Yazidis, Mandaeans, and Elamites[clarification needed][57] under a list of possibly monotheistic groups, and under the final category, of "polytheism and pantheism", he listed Zoroastrianism, "Vedas, Puranas, Tantras, Reformed sects" of India as well as "Brahminical idolatry", Buddhism, Jainism, Sikhism, Lamaism, "religion of China and Japan", and "illiterate superstitions" as others.
[60] In the latter half of the 20th century, the category of "world religion" fell into serious question, especially for drawing parallels between vastly different cultures, and thereby creating an arbitrary separation between the religious and the secular.