i've always fancied the idea that aliens created human to be their slave race. after we built the pyramids i think they were dissatisfied and left us to develop more.
It's a *Cosmic * theory - and one that would answer a number of questions surrounding human development. Inter breeding? Through genetic means more than physical seems more likely; after all interstellar and maybe dimensional travel seems a more clinical and effective method of reproduction, although it seems that it is our flaws that make us, so was this a deliberate act of developmental control itself? Parental choice indeed Do we really know the background of our friends and neighbours and their forbearers? I'd like to think that if it was a factual analysis and if we are not born, of astral delights, then we are children of more imaginative creativity, should we learn to use the idle parts of our brain. If it is for a reason and hopefully it is for good – and dreams of paradise can someday, one day be realised - here’s hoping “Keep watching the skies” – for to coin one of my favourite phrases “The truth is out there” whether in the heavens or in the surroundings that we as yet, still blinded to see
I don't know OP. IMHO, thousands of years ago, humans had more mental capabilities then they do today. It may be possibly they moved blocks and boulders with their minds.