PBS in 1988 as a documentary interview with Bill Moyers, The Power of Myth, written by Joseph Campbell, was also released in the same year as a book created under the direction of the late Jacqueline Kennedy Onassis. The Power of Myth links the image of the Earth or Mother Goddess to symbols of fertility and reproduction. For example, Campbell states that, "There have been systems of religion where the mother is the prime parent, the source... We talk of Mother Earth. And in Egypt you have the Mother Heavens, the Goddess Nut, who is represented as the whole heavenly sphere". Campbell continues by stating that the correlation between fertility and the Goddess found its roots in agriculture: Campbell also argues that the image of the Virgin Mary was derived from the image of Isis and her child Horus: "The antique model for the Madonna, actually, is Isis with Horus at her breast", see Isis#Possible influence on Christianity. According to Joseph Campbell, One of these metaphors is Eve. Campbell argues that Christianity, originally a denomination of Judaism, embraced part of the Jewish pagan culture and the rib metaphor is an example of how distant the Jewish religion was from the prehistoric religion—the worship of the Mother Goddess or the Goddess. Earth as Goddess Many people involved in the Goddess movement regard the Earth as a living Goddess. For some this may be figurative, for others literal. This literal belief is similar to that proposed by Gaia hypothesis, and the Goddess-name Gaia is sometimes used as a synonym for the Earth. For the Goddess-movement practitioners, Gaia personifies the entire earthly ecosystem and is the means to achieve harmonic symbiosis or the wholeness and balance within the natural worlds and physical environment. Many of those in the Goddess movement become involved in ecofeminism, and are concerned with environmental and ecological issues. Goddess-movement adherents claim the hierarchical scheme giving humans dominion over the Earth (and nature) has led to lack of respect and concern for the Earth, and thus to what scientists identify as environmental crises, such as global warming. Rather than having dominion over the Earth, Goddess-movement theorists see humans living as part of the Earth environment, and also refer to Earth as "Mother". Here, humans are considered on equal level with non-human inhabitants since all must be accorded the same moral and religious consideration, respect, and reverence. Some such as Monica