Western Christianity's adoption of Greek philosophical dualism has profoundly shaped how modern societies relate to both nature and women, creating parallel systems of exploitation that continue to fuel environmental destruction and gender oppression. Through critical feminist analysis spanning theology, ecology, and social sciences, this research reveals how core Christian doctrines - particularly concepts of transcendent divinity, hierarchical anthropology, and otherworldly salvation - have legitimized patriarchal power structures through binary oppositions of spirit/matter, culture/nature, and male/female. Theological examination of Christian texts and traditions demonstrates how anti-corporeal attitudes toward embodiment and sexuality have systematically positioned both women and nature as subordinate objects of domination. The analysis traces how religious concepts like divine transcendence, the "great chain of being," apocalyptic millennialism, and body-soul dualism provide ongoing ideological justification for environmental exploitation and gender-based oppression. Addressing our accelerating ecological crisis requires fundamental theological reconstruction, including embracing divine immanence in creation, redeeming embodiment and sexuality, rejecting anthropocentric salvation narratives, and developing non-hierarchical, earth-centered spirituality. Without such radical transformation, Christianity risks irrelevance in the face of planetary ecological collapse.