As has been noted by Joseph Campbell in "Occidental Mythology" and others, Bachofen's theories stand in radical opposition to the Aryan origin theories of religion, culture and society, and both Campbell and writers such as Evola have suggested that Bachofen's theories only adequately explain the development of religion among the pre-Aryan cultures of the Mediterranean and the Levant, and possibly Southern Asia, but that a separate, patriarchal development existed among the Aryan tribes which conquered Europe and parts of Asia.