Shri KRS,
Please don't consider this as my impudence; I stand to benefit greatly from your views.
My doubt, for a long time, has been whether this whole universe (or multiverse, as now postulated) is in itself, by itself and for itself? (This is very foolish wording, but I can't express better, for want of vocabulary.) Why should one have a "creator", whether anthropomorphic or not? I am aware that the moment we say "God" the next possible question, "who created this God?" will not arise because we have been so conditioned by religion; but if I say "Force/Energy/Field/Brane X, Y or Z", then the next question comes, who created this? Should we not, scientifically speaking, have the doubt "Who created God?" also? In that case there will be no answer, or an infinite regress. Is it not clear that by our embedded notions of Divinity or Deism, our scientific rationality has been stymied?
Science is not at a stage to answer the question 'who created God?', because unless they can define an entity that is the cause for the 'Big Bang' or the gravitational laws creating multivariate universes, Science can not speculate on the nature of this entity, which necessarily has to be beyond time and space. So they are at a dead end, more so because today they can not even test the multivariate theory in the lab and they admit that it possibly can never be proved. This is why, I am not holding my breath on Physics figuring out the final entity that is beyond time and space. Because our Scientific principles are built on observations made within a space-time bound material universe(s), we really can not expect it to show us what is beyond these principles.
Is it not a sign of the high "ego" of human beings - the feeling that there is something very great and unique in them - that is at the very root of the search for liberation/merging with the deity? (Since Man is something very great, there must be something unique for him after the sojourn in this world. He becomes the Absolute beyond which there can be nothing? What if man is no better than a virus or amoeba as far as Nature is concerned?) In both Advaita and Visishtadvaita, there is no concrete evidence for anyone having attained liberation; nor can they rationally explain how newer and newer "jivas" come into existence. If the infinite jivas concept is accepted (for argument's sake) where do the still unmanifested jivas (Infinity-the present world population) exist now? If those jivas have the adhyaaropa (Maya) covering each of them, is there other world/worlds where they could exist? Will those worlds be equally unreal just as this world is, as per Advaita? Why did not our sages/Acharyas tell us about these worlds? These are some points in my mind.
First a clarification - Advaitha, to my knowledge does not say that the world is unreal - it is quite real real as it appears to our senses - it is just not the 'REAL' thing that supports it.
Your ruminations on man's ego as a postulate to have a necessity for God may be valid. But even if it is true, after all, just because this may be true, that still does not disprove the existence of 'God'. One can argue that this ego issue was particularly given to us by God, to turn our minds to 'Him'. I don't know, except there clues about God's existence are everywhere, in my opinion, that can not be explained by science today. Have you read Paul Brunton's 'The secret India?'.
About the increasing numbers of humans, my belief on this is that souls are created at the bottom most level (amoebas may be, that divide and multiply?) and as they evolve in to successive versions of acquiring self consciousness (represented perhaps by the 10 avatars?), more human souls come in to being. This is my theory.
Again, I do not mix science and spirituality - where science applies I heed to it. Where in areas, science has no answer, I turn to spirituality. Because I was born as a Hindu, I tend to find my answers within it, which works for me.
Kindly give me your ideas on these.