Death of God theology refers to a range of ideas by various theologians and philosophers that try to account for the rise of secularism and abandonment of traditional beliefs in God by positing that either God has ceased to exist or in some way accounting for such a belief. Although theologians since Nietzsche have occasionally used "God is dead" to reflect increasing unbelief in God, the concept rose to prominence in the late 1950s and 1960s, before waning again. The Death of God movement is sometimes technically referred to as "theothanatology," deriving from the Greek theos (God) and thanatos (death). The main proponents of this radical theology included the Christian theologians Gabriel Vahanian, Paul Van Buren, William Hamilton, John Robinson, Thomas J. J. Altizer, Mark C. Taylor, John D. Caputo, the rabbi Richard L. Rubenstein, and Peter Rollins.
The theme of God's "death" became more explicit in the theosophism of the 18th and 19th century mystic William Blake. In his intricately engraved illuminated books, Blake sought to throw off the dogmatism of his contemporary Christianity and, guided by a lifetime of vivid visions, examine the dark, destructive, and apocalyptic undercurrent of theology. Most notably, Blake refused to view the crucifixion of Jesus as a simple bodily death, and rather, saw in this event a kenosis, a self-emptying of God. As Altizer writes, Blake "celebrates a cosmic and historical movement of the Godhead that culminates in the death of God himself."
In the 19th century, Death of God thought entered philosophical consciousness through the work of German philosopher Georg Wilhelm Friedrich Hegel. Drawing upon the mysticism of Jakob Böhme and the Idealism of Johann Gottlieb Fichte and Friedrich Wilhelm Joseph Schelling, Hegel sought to revise Immanuel Kant's Idealism through the introduction of a dialectical methodology. Adapting this dialectic to the chief theological problem, the nature of God, Hegel argued that God (as Absolute or Father) is radically negated by the concrete incarnation of God (as Christ or Son). This negation is subsequently itself negated at the Crucifixion of Jesus, resulting in the emergence of the Holy Spirit, God as both concrete (the church) and absolute (spiritual community). In Hegelian thought, therefore, the death of God does not result in a strict negativity, but rather, permits the emergence of the full revelation of God: Absolute Consciousness.