@Matias Since you have read those books, please answer my question...

@Krish55 Allow me, if you would, to take a stab at it, as a layman. Early Christianity (long before the conversion of emperor Constantine) contained a number of ideas which were poison pills to empire. Paul talks about the priesthood of each believer, and opened up the early Christian church to Gentiles, thus making the world flatter, more potentially interconnected and religion less hierarchical. The New Testament speaks of the first convert being a man from Ethiopia, which opens the church up to all ethnicities.

Because the early Christian church was an underground religion, converts met in small groups and were not given to public displays of their faith. In fact, early Christianity created a division between church and secular life. “Render unto Caesar that which is Caesar’s…’”

And the earliest Christian churches were much less classist, as both slave and slave holder, Government official and common citizen, as well as peasant and publican could be “saved” and could worship in the same space.

Finally, the elevation of Mary (the follower, not the mother of Christ) opened philosophical if not physical doors for women.

Unfortunately for the world, these novel ideas were lost for millennia, due to the establishment of patriarchal Christian theologians and clergy, and the adoption of Christianity as the state religion by Rome. Only later after Gutenberg and expanded literacy enabled all to read the so-called sacred texts would these ideas return on a broader scale.

Remove all the bad parts about Christianity: its emphasis on damnation and hell, its male dominant hierarchies, its insistence on paying offerings and tithe, and its damned swagger in militancy, and there’s some downright humanist concepts that just took some time to percolate to the top.