We were just chatting over coffee and my wife plunks down Journey of Souls by Michael Newton. She bought it to kill time on the train. I'll have a look. But we are headed for a funeral today and this sort of thing has been very much the topic lately.
In the preface the author makes a distinction between all life on Earth and humans in that they do not live in fear of their mortal existence and we do. Beyond a basic survival instinct is that true? I mean, someone figured out dolphins are one of the few animals who **** just for fun so maybe there has been some time spent on this, who knows. If so the US taxpayer probably had to foot the bill.
We are the most advanced apex predator on the planet. All sorts of near-misses similar to us but we made it to the top through evolution. With the exception of maybe your appendix if we have some particular ability or behavior it's there for a reason, or was. In order to build complex social structures like we do and ultimately thrive we've had to make compromises between our basic instincts and group behavior. The second oldest profession is to be a shaman who can tell you what goes on in the dark beyond where fire light and that's where we cooked up some of our most intimate beliefs. Repeat something loud enough and long enough it becomes fact. Do that for millions of years and it gets into the wiring I think.
In short, if we lacked these beliefs and everyone actually knew for a fact there is no accountability or existence beyond death or any of that we wouldn't be the apex predator we are, we'd have wiped ourselves out long ago. Don't think sociopaths are going to be too successful building complex civilizations. This belief is an evolutionary check valve that allows our line to succeed in ways others couldn't. Not the only reason but an important one. The behaviors that favor group dynamics are more acceptable than the ones that don't.
What a steaming pile for a rainy Friday. Personally, I don't think we're just meat bred with belief and couldn't change my mind if I wanted to. I really do think you could make that argument though. A bit like the plain old nuts & bolts theory about ET, sucks all the fun out of it.