Salty writes:
I won't give natural selection any credit for anything.
Maybe you can explain what, in your view, is wrong with this:
No organism has perfect DNA. You can always find places where a change would be for the better. If we consider only single-base-pair mutations, then a random mutation has the possibility, however slight, of occurring in a place where it would improve the organism.
Most mutations will be neutral to negative, and natural selection will proportionally weed out the more negative mutations. The small number of positive mutations will be selected for and will increase in proportional representation in the population.
This process continues for generation after generation, gradually improving the organism's adaptation to the environment, and allowing it to respond to changes in the environment.
--Percy