See
Religion In Future Histories on the Science Fiction blog which links to "CS Lewis and James Blish" on the James Blish Appreciation blog. Having addressed this subject at length before, I will be brief here. This post is occasioned by a (to me) new input from SM Stirling and David Drake. It is also the kind of post mentioned
recently that compares many futuristic sf series, including several by Poul Anderson.
Wells' The Shape Of Things To Come
Religions are eradicated.
Stapledon's Last And First Men
The Daughter of Man, the Divine Child and
divine birds.
Stapledon's Star Maker
The Cosmic Mind has a vision of the Star Maker creating universes.
Heinlein's Future History
The US becomes a theocracy.
Heinlein's Stranger In A Strange Land
Christian and Hindu theologies are reproduced as Fosterite and Martian.
Martian Old Ones are visible, audible ghosts.
Asimov's Foundation and Herbert's Dune
Cynical manipulations of popular religions.
In the
Dune history, Israel becomes "Secret."
Bradbury's The Martian Chronicles
The Martian Old Ones are one with nature and do not need Christian ministry.
Lewis' Ransom Trilogy
Ransom meets the presiding angel of Malacandra (Mars).
Ransom prevents the Fall of Perelandra (Venus).
A demon manifests on Thulcandra (Earth) but Merlin returns and planetary angels descend.
Corwainer Smith's Instrumentality of Mankind future history series
Christianity goes underground.
Blish's Cities In Flight
Believers/Witnesses proclaim imminent immortality as antithanatics are discovered.
Interstellar nomads invoke "gods of all stars!"
Jorn the Apostle leads the Warriors of God in the Greater Magellanic Cloud.
Blish's The Seedling Stars
Adapted Men believe that they were placed on an extra-solar planet by supernatural "Giants," not by the Colonization Council.
Blish's After Such Knowledge Trilogy
Roger Bacon might have been demonically inspired.
Demons appear and act on Earth.
A planet explodes when a priest exorcises it.
Anderson's Technic History
The Ythrian New Faith troubles a Christian.
Wodenites convert to Terrestrial religions.
Fr. Axor seeks evidence for the Universal Incarnation.
Olaf Magnusson, indoctrinated, accepts the racist monotheism of the Merseian Roidhunate.
Do some human choth members on Avalon embrace the Ythrian Old Faith?
Anderson's The Corridors Of Time
Matriarchal mysticism meets militant materialism.
Anderson's Time Patrol series
We do not know about the Danellians.
Anderson's Genesis
A far future planetary intelligence re-creates extinct human beings and guides them in the form of gods in which they would in any case have believed at an early stage of their development.
Niven's Known Space future history series
Mad Kdapt-Preacher believed that God made man in His own image because men kept winning wars against kzinti.
Kdaptists prayed wearing human masks.
Pournelle's CoDominium future history series
A dark nebula with a single bright star resembles a hooded, one-eyed face so the Church of Him is founded.
Aldiss' Helliconia Trilogy
The Helliconians are in direct contact with their hereafter.
Stirling's Emberverse
Gods manifest and human beings enter a hereafter.
SM Stirling's and David Drake's The General series
Human beings isolated on an extra-solar planet after the Fall of interstellar civilization reflect anthropocentrism and their interstellar past by calling God "Spirit of Man of the Stars."
The Spirit is believed to be served by angels and to indwell miraculous Avatars.