This paper contributes to the religious dimension of the intellectual history of transhumanism by examining its formative conceptual roots in the thought of evolutionary biologist Julian Huxley (1887-1975). As the figure who coined the term "transhumanism," Huxley explicitly envisioned it as a prospective "religion of the future." The paper situates transhumanism within the broader cultural, scientific and philosophical conditions of the mid-twentieth century, tracing its development as a worldview shaped by evolutionary theory, secular humanism, and enduring aspirations for transcendence, meaning, and salvation. The paper argues that transhumanism cannot be understood apart from the history of evolutionary biology as it was interpreted through metaphysical frameworks. Particular attention is given to Huxley's dialogue with the Jesuit priest and paleontologist Pierre Teilhard de Chardin (1881-1955), examining their personal relationship and mutual intellectual influence. Their dialogue illustrates how evolutionary theory was imbued with teleological and spiritual meanings, producing both tensions and convergences between Darwinism, Christian theology, and eschatological conceptions of the future. Focusing on the 1950s, the paper explores conceptions of evolution as a mystical process guiding humanity toward a transcendental future. It argues that early transhumanist thought emerged from a synthesis of evolutionary science, teleological philosophy, and religious conceptions of human destiny.