Who said anything about "improving the genetic code? This shows a lack of understanding of genetics and population biology. Beneficial mutations are only beneficial for a set of circumstances. Change the circumstances and anything can happen. There is no perfect genetic coee by which the code is striving to reach.This is not a problem for me, too bad it seems to be a stumbling block for you.
It's a problem for anyone that thinks that Man walked the earth with 100+ species of large meat eating dinosaurs.
Are you not aware that since the fall, mankind has and still does survive in spite of meat-eating animals [some are even bigger than us] and poisonous plants?
I am unaware of something called "the fall" ever actually happening. Go on and compare 100+ large species of meat eating dinosaurs with possible predators of today. Lions are not Tyrannosaurus rex or any of the other 100+. You think T. rex ever feared this Man he lived with? Just....wow.....it gets even better.
Precisely. E.g. the skin pigmentation. White skin is an evolutionary adaptation to living at higher latitudes, where people with darker complexion suffer from vitamin D deficiency. But under different circumstances this mutation, beneficial in Northern Europe, can become detrimental (too much sunshine, skin cancer).