/lit/ - Literature

So I'm haunted by the idea of that the world we live in now(let's call it a plane) is the first plane and when we die we continue to the next one with all of our knowledge and memories. We are born normally but we grow up knowing the mistakes and fall-pits of life, and so does everybody else. Eventually after we die and reincarnate enough, we will become gods/demi-gods or perfection of human beings, able to the see the past and future(though not altering the past).

tl;dr: what if we reincarnate but keep our memories from past life?

There are some problems though...
-How many planes could there be? I mean... Eventually life expectancy will rocket as humans develop, and many will eventually reside to one plane, but some will want to continue reincarnating, searching for something finite.
-How would previous plane inhibitors be accepted into new ones(e.g. Adolf Hitler, John F. Kennedy).. will they try to hide or continue with their path, and how will people cope with being granted new chances, new parents and a new altered timelines?
-If people stopped getting pregnant/giving birth, then would that plane be the last one to carry humanity or would people "jump" past that plane?
-When during pregnancy will a fetus become aware of being able to remember?

And lastly: are there already any books on this subject?