There is only sequencing. All of our reincarnational lives are proceeding simultaneously. Nothing is ever lost in time and space. It only changes into a different form of energy. Linear time was created for humans on Planet Earth so that their ill thoughts towards one another would have enough distance to do less harm.
Earth is a school house.
The soul comes into embodiment and learns what it can from human encounters. All that it takes back are the feelings from the experiences. We create our own reality. If we accept these principles as our reality, then the Grace of Planet Earth becomes more clear to us. We can fully experience and appreciate the exquisite gift we received when we were granted the use of these marvelous human bodies.