Now I don't cry for the loss of religions old and new but the Christianization of Europe coincided with massive acts of brutality and destruction of livelihoods more fulfilling then the clout the Abrahamics with their vastly more stratified society brought in.
There are many things to praise about the classical world, but they were in fact heavily stratified societies, with giant slave populations, a caste system complete with aristocratic orders of patricians and (in ancient Rome) led by an Emperor who anointed himself as a divine figure with his own personal cult.
Yes, they were incredibly stratified. Dissolution of the bulk of that was clearly a big part of the social appeal of Christianity, much as also appears to have been the case with its unusually positive stance towards women - a
very big contrast with Classical norms, that.