Mythopoeia (), or mythopoesis, is a narrative genre in modern literature and film where an artificial or fictionalized mythology is created by the writer of prose, poetry, or other literary forms. This meaning of the word follows its use by J. R. R. Tolkien in the 1930s. The authors in this genre integrate traditional mythological themes and archetypes into fiction. Mythopoeia is also the act of creating a mythology. The term mythopoeia comes from Hellenistic Greek muthopoiía (μυθοποιία), meaning 'myth-making'; an alternative is mythopoesis (μυθοποίησις) of similar meaning. The definition of mythopoeia as "a creating of myth" is first recorded from 1846. In early use, it meant the making of myths in ancient times. It was adopted by J. R. R. Tolkien as the title of one of his poems, written in 1931 and published in Tree and Leaf. While many literary works carry mythic themes, only a few approach the dense self-referentiality and purpose of mythopoesis. Mythopoeic authors include Tolkien, C. S. Lewis, William Blake, H. P. Lovecraft, Lord Dunsany, Mervyn Peake and Robert E. Howard. Works of mythopoeia are often categorized as fantasy or science fiction but fill a niche for mythology in the modern world, according to Joseph Campbell, a famous student of world mythology. Campbell spoke of a Nietzschean world which has today outlived much of the mythology of the past. He claimed that new myths must be created, but he believed that present culture is changing too rapidly for society to be completely described by any such mythological framework until a later age. The philosopher Phillip Stambovsky argues that mythopoeia provides relief from the existential dread that comes with a rational world, and that it can serve as a way to link different cultures and societies. Mythopoeia is sometimes called artificial mythology, which emphasizes that it did not evolve naturally and is an artifice comparable with artificial language, and therefore should not be taken seriously as mythology.