Fang religion as recorded in this atlas rests heavily on a single sustained anthropological study of Bwiti, the visionary tradition centred on the ritual use of the iboga plant among the Fang of Gabon, Equatorial Guinea and southern Cameroon. James W. Fernandez, an American anthropologist, conducted fieldwork among Fang Bwiti congregations from the 1950s onward and published Bwiti: An Ethnography of the Religious Imagination in Africa in 1982, arguing that Bwiti should be read not as a fixed doctrine but as an ongoing, creative synthesis in which Fang communities worked through the disruption of colonialism, missionary Christianity and the loss of older initiation structures by building a new religious form out of all three.
Fernandez traced how Bwiti congregations differ from one another in emphasis and imagery while sharing a common structure of initiation, night long ceremony and the visionary journey the iboga plant is understood to open, treating that variation as evidence of a living, still forming tradition rather than as a deviation from a single correct version. Nzame, the creator figure named in the pantheon here, appears within this wider Bwiti cosmology rather than as a separately worshipped deity outside it. Bwiti has since been formally recognised as a national religion in Gabon, one of relatively few African initiatory traditions to receive that status.