Treatise on the History of Religions

Mircea Eliade is known for his attempt to find broad, cross-cultural parallels and unities in religion, particularly in myths. Wendy Doniger, Eliade's colleague from 1978 until his death, has observed that Eliade argued boldly for universals where he might more safely have argued for widely prevalent patterns". His Treatise on the History of Religions was praised by French philologist Georges Dumézil for its coherence and ability to synthesize diverse and distinct mythologies.

Robert Ellwood describes Eliade's approach to religion as follows. Eliade approaches religion by imagining an ideally "religious" person, whom he calls homo religiosus in his writings. Eliade's theories basically describe how this homo religiosus would view the world. This does not mean that all religious practitioners actually think and act like homo religiosus. Instead, it means that religious behavior "says through its own language" that the world is as homo religiosus would see it, whether or not the real-life participants in religious behavior are aware of it. However, Ellwood writes that Eliade "tends to slide over that last qualification", implying that traditional societies actually thought like homo religiosus.

"No one has done so much as Mr. Eliade to inform literature students in the West about 'primitive' and Oriental religions. . . . Everyone who cares about the human adventure will find new information and new angles of vision."

—Martin E. Marty, New York Times Book Review