Uhm, where is your question?
I don't see it in this thread...
Which question in which thread are you referring too?
You ask how the genetic diversity came into place? well, Look at dogs... I bet they come from about max 50 wolves originally. See how fast we made em into the creatures they are now.
Plus, I do believe we have degraded greatly in our humanity.
In the beginning(so the bible says) God created Adam, and all God created was perfect, so Adam, was the perfect human being, in all things.
He had the brains, he used every part of his brain(Today we only use a portion of our brain actively), he had no built in diseases(sugar disease, hart diseases, being supseptive for cancer, boldness, fatness, name it, he didn't have it) He was perfect.
Not only physically he was perfect, mentally also, he was loving caring sharing, willing to lay his life down for love...
Now look at todays humans... who of the humans today has a body that doens't have a "flaw" with it?
Look at the diversity of the mental diseases, look at all the inheritable diseases that sprout up.
Look at the increase of down syndrom people that are being born...
Face it, throughout history, humanity has degraded greatly and has become stuck with a lot of ailments that weren't there in the beginning.
Michael