Here is a wiki article with lots of charts & graphs that could begin to explain. It includes representations like these:
Of course, I "get" that your terms "evidence of observable progression" are usually code words for "I don't believe a word of it, and won't accept anything you say", but on the off-chance that you just randomly picked those words, I'll make an effort -- in all good faith -- to explain it.
I said observable progression because I meant it.
I don’t talk in code words. Do you “get” that?
I appreciate the wiki page which I have looked over in the past.
As you might suppose my question has to do with the seemingly sudden appearance of civilization after millenia of savagery and near savagery.
Supposedly someone like you can tell me how fishies somehow became birdies and yet no one seems to have a clue how modern man sprang into being.
I recently read a long article in the New Yorker by Elizabeth Kolbert profiling an autodidatic researcher who has long puzzled over the obsession of scientists as to why the Neatherthals died out as opposed to any curiosity about where/why WE came into being.
Alas at the end of that article I had little more understanding myself.
At any rate thanks for your efforts.