Two comments in "Journey of the Souls" in the introduction (page 1) confirmed in my mind the concept of reincarnation; “Dying makes all of our earthly goals seem futile” and “If death were the end of everything about us, then life indeed would be meaningless”. If you extend this thought, it conveniently explains why some great people, both past and present, have set and accomplished goals that go above and beyond the purely materialistic, to benefit their community or country.
If you read this book, you will also note that we had choices in the spirit world regarding the type of life we wanted to be born into; we chose our parents, the city and the experiences we needed to have in order to learn certain lessons in this life. Some of us purposely chose a difficult life, perhaps to learn humility and to understand pain and suffering. Others may have chosen a life as a disabled person to gain insight, some chose to die in infancy or prematurely; but it appears mainly in an attempt to aid or assist their loved ones with some learning experience, perhaps how to cope with grief.
It all sounds feasible; read it with an open mind and make your own judgment. Worth considering, if for no other reason than to give you the focus to make the most of this lifetime towards gaining credits for the next! The harder the life, the more brownie points we attract!
Bottom line, I think that we need to make the most of the here and now, try to do the best we can under our current circumstances. Our lesson is to learn as much as possible about ourselves and to approach life with a view to making a difference and contributing something of value to our family and community using all the tools available to us.