Death of God theology refers to a range of ideas by various theologians and philosophers that try to account for the rise of secularity and abandonment of traditional beliefs in God. They posit that God has either ceased to exist or in some way accounted for such a belief. Although theologians since Friedrich Nietzsche have occasionally used the phrase "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."