WI: Classical Philosophy without Christianity?

Just out of curiosity, how exactly would philosophy develop in Classical Antiquity if Christianity never came about? For our purposes, let's say Jesus was never born and no equivalent off-shot movement arises that gains the same traction in Judaism.

From my understanding, there was a degree of mutual influence between early Christianity and schools such as (Middle) Platonism (eventually leading to Plotinus and (Neo) Platonism). What concepts would either not arise at all or be very different? Would more Materialist schools such as Stoicism and Epicureanism remain dominant, especially among the Empire's intellectual elite?
 

Maoistic

Banned
Stoicism wasn't materialist in our modern conception. It believes in the soul and in a special abode of Zeus to which the soul goes after death. It's just that Stoics believed that they were material as well, in opposition to the Platonists who believed the soul and the gods were of an immaterial substance. Epicureanism also believed in gods, Lucretius even saying the world was created by the goddess Venus, so it isn't exactly immaterial either.

If Christianity doesn't exist, Platonism becomes the dominant synthesiser of Greek philosophy as it happened in history. So basically Greek philosophy becomes akin to Christian scholastics.
 
Platonism isn't an organized school of thought or religion. Christianity drew heavily from it, as all the other Gnostic faiths. Its important to say that historians can only speculate about the rise of Christianity in the Roman World, there's no definite answer here, however, it's quite clear that most Gnostic beliefs and Christianity a similar philosophical base. That being said, any form of Gnosticism is the best answer to the op. One interesting choice would be Manicheism, as it would culturally unite the Persian and Roman worlds.
 
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