Out of an interest in late antiquity, I've been fascinated by the change from paganism to Christianity. Under paganism, rites were carried out to secure favor for the society and if there was a personal aspect, it was transactional (if you grant me favor, I will make such-and-such a sacrifice). But this tradition also contained various mystery cults wherein secrets would be revealed to you upon initiation (the popularity of which increased in late antiquity). Early Christianity can be seen to function in this mystery cult niche, but why should it have proven to be so successful? My suspicion is that the personal aspect of religion and revelation became increasingly important. Why that might be is good fodder for speculation.
To relate this to the part of what darkwater you are responding to:
> My biggest issue, implicit in my initial comment, is that we as humanity should grow up and stop needing a mythical figure like a "God Almighty" to care about our neighbor.
And the heart of your response:
> It turns out, people can relate to, be influenced by, and learn from participating in stories with other people a LOT more than they can by changed by propositional debates and lectures.
I have the sense that there was a moment in western culture (vaguely late golden/silver age of Roman literature) when we could have stepped past religion into philosophy. Stoicism was well-regarded, its aim (like cynicism and epicureanism) was to achieve a state of ataraxia, tranquility, and a major portion of the curriculum was logic. But a mass shift in mentality towards personal divine revelation took place instead, so I (reluctantly) have to agree with you.