Philosophy of religion can be broadly described as an inquiry into problems involved in religion or originated by religion from a philosophical point of view. Since, however, there are various understandings of religion and of philosophy and of the relation between them the field of philosophy of religion has become vast and varying. As a separate subject it originates from the European enlightenment, but its content can be traced back to the early stages of European philosophy, and there are rich traditions related to Hinduism, Buddhism, and Chinese religions.