Hi Jonjo,
I agree with Vicky -- I don't think any birth is "wasted." For whatever reason, those souls who are living difficult lives are doing so for a specific reason. It may be to learn a lesson -- or it may be to teach one to someone else.
I don't think we can fully comprehend all of the possibilities while we are incarnate. Some people believe we have our lives mapped out for us -- others believe we have some choice, but a general "plan" or "guideline" is set up by us when we are born.
I believe -- that nothing could be entirely mapped out -- because that would defeat the purpose of free-will and choice, thereby denying us the opportunity to make the decisions we need to -- to learn the lesson.
My personal belief – is that we don’t necessarily choose the circumstances to which we are born – but rather we
create them by our thoughts and emotions at the time of death. I believe the way we act, and the thoughts we think -- in this life -- are directly responsible for the type of life that we will experience in the future.
Thoughts and emotions happen as a result of our interactions with the world based upon our perception of past experiences. It is how we perceive this world that forms our thought processes -- they become reactions and behaviors, unconsciously, or consciously. Our thoughts create our feelings, emotions, behavior, and what we attract and magnetize into our lives -- both now and in the future. What we reflect outward, we also draw back toward us.
Buddha said
“Thy thought-forms reappear.”
Through Buddhist doctrine we are told that the final moment of our consciousness is paramount.
Through our actions in this life we literally create the worlds in which we are to be born.
That's how I see it.
Ailish