In ancient times, philosophers and theologians embraced Plato's Idealism because they could use it to explain consciousness and mental abstractions as divine powers the gods themselves were willing to share with humans. Then, in the fourth century, St. Augustine combined Idealism with Aristotle's Solipsism and devised the human soul to explain how Christ's promise of an afterlife was supposedly possible. Augustine's readers were Roman Pagans familiar with Greek philosophy, -- Pagans he hoped to convert to Emperor Constantine's new religion, Catholicism. According to Augustine, each soul was supposedly a bit of God's own immortal essence, loaned to every person at the moment of their birth. Thus the soul was presummed to be immortal because it was supposedly a piece of an immortal Being -- a piece which would return to God when the mortal human eventually died. Until then, that bit of the Divine, the soul, was purportedly how it was possible that people were conscious, self-aware, and able to think This concept, that ideas themselves are the province of the gods, is the part that comes from Plato.
The early Church built an enormous body of superstitious nonsense, all based on unsubstantiated, untested philosophies which they merely presumed were sound. They purported that the basis of reality was human mental experiences and that the physical realm was merely a hallucination created by the soul-based human mind. As one might expect, since they had no actual facts and didn't bother to test their superstitions, they were completely and totally wrong.
Then, about 400 years ago, Galileo speculated and Newton proved that the physical realm not only exists, but that it is the actual basis of objective reality. In other words, the only reality ever proved to truly and objectively exist is the materialistic physical realm.
This shot a big hole in Christian theology, which heavily depended on Solipsism to justify their assertion that human mental experiences were real and that prayer was literally capable of shaping reality.. What use are rituals and prayers, if human thoughts and perceptions are merely abstractions and not actually real?
Then, at the beginning of the twentieth century, the final nail was driven in the coffin of superstitious theology. The EEG machine was invented and it was conclusively proved that the source of all human mental experiences is our own nervous system and self-contained living brain. We now know with utter certainty that souls have always been merely imaginary. Although souls have long been reputed to explain consciousness and immortality, those ancient make-believe entities actually have nothing whatever to do with our personalities or why we are conscious and self-aware. In other words, our mind has nothing to do with Augustine's imaginary bits of God's immortal essence. It is now a verifiable fact that our mind is entirely based on natural processes operating within our own living brain.
This means there really and truly is no such thing as an afterlife. The truth is, when you're dead you're done, plain and simple -- because your mind cannot possibly exist without your living brain. Personally, I expect total oblivion and it won't matter to me one bit because "I" simply won't exist anymore. I expect it will be exactly like before I was born. ...simply nothing.
I'm 63 and I can tell you that our attitudes about living and dying change as we mature. I'm old enough that more than a few of my friends and family are already gone. I was with some of them at the end and they felt little fear because they were reconciled to their fate. I fully expect I will die with the same dignity and as gracefully as my peers. I'd much rather understand the factual truth about life and death, than to wallow in the superstitions of our ignorant ancestors, that's for sure.