Not all ancient Christians believed in the Genesis creation story.  Some Christians, called Gnostics, believed in an entirely different story for how we got here.  The high tide of the conflict between Gnostics and creationists occurred in the mid 2^nd century with the arrival of Valentinus and Marcion.  At that time, the Gnostics and the creationists apparently finalized their schism after a decades-long controversy within the important congregation at Rome.  This event began during the time of Pope Hyginus, as the ancient histories record:

 

Valentinus came to Rome in the time of Hyginus (136-140 AD), flourished under Pius (140-155 AD), and remained until Anicetus (155-166 AD).  Cerdon, who was Marcion's predecessor, also arrived in the time of Hyginus.[1]

 

Where was Marcion?... Where was Valentinus?... These men did not live long ago, but primarily in the reign of Antonius (138-161 AD, Roman Emperor), and they at first believed in the doctrines of the Catholic Church, and were in the congregation at Rome, until the papacy of the blessed Eleutherus (174-189 AD), when they were expelled more than once, on account of their ever restless curiosity with which they infected the membership.[2]

 

     Notice how long these two men were in the Catholic Church before they were excommunicated!  They were members of the Roman congregation for over 30 years before they were finally kicked out!  One must ask why they were tolerated for so long – for if they were here today, and if they were to espouse today the same doctrines that they espoused back then, they would find themselves expelled much more quickly than in 30 years.  The best explanation for this, I believe, is that the Gnostics and the creationists existed side by side within the Orthodox-Catholic Church, and that only late in the 2^nd century did the creationists gain such a solid grip on the Church that they were able to label the Gnostics as "heretics" and thereby excommunicate them.  This underscores that Gnostic beliefs about the origins of the cosmos were considered legitimately apostolic in the earliest times, for if they were not, the creationists would not have had such a difficult time expelling them.  Only after several generations had past could they garner the support necessary to expel them once and for all.

          Valentinus and Marcion were the most influential Gnostic teachers bar none.  They were a serious threat to the creationist doctrine, as the ancient creationist historians give witness, for these historians spilled a tremendous amount of ink in an effort to discredit especially these two.  Valentinus and Marcion adamantly opposed any notion that a good God had created the universe.  Instead, they insisted that a wicked and foolish god had created the universe. 

Click to read more about how ancient Christian Gnosticism is compatible with evolution.

The creationist narrative in Genesis 1 is contradicted by many ancient Christian texts.  Instead of an Almighty Creator God, ancient Christian texts espouse that the universe is born from blind arrogance and stupidity.  The angels caused evolution to occur from species to species.  There are many gods, (or aliens?), and the Christian God is just one among them.  Satan the Devil writes scripture, and thus the Bible was polluted with Genesis 1.  Archaeology and modern scholarship demonstrate that Genesis is indeed corrupted.  Cavemen walk with Adam and Eve.  Esoteric prophecies reveal the coming of Christ, and also reveal the dark forces that govern the cosmos.  Such are the ancient Christian writings.

Science vindicates the truth of these ideas.  Evolution often happens too fast for Darwin’s theory.  Gaps in the fossil record indicate that some kind of unnatural force acts together with natural selection.  Astrobiology reveals that intelligent life probably evolved long before us.  The fossil record reveals strange clues that aliens abducted species and transported them across oceans, and that DNA from diverse lineages was combined to spawn hybrid species.  Evidently, aliens influence evolution, and they are the gods of the world’s religions. 

This is not fiction.  All these facts are thoroughly documented in the links above.