Natural selection and survival of the fittest is not a mechanism to increase complexity. It is only a negation.
DNA
Did not happen by accident.
You have missed out the fundamental bit - DNA is constantly mutating and making changes to organisms. Natural selection is only part of it. Thus the variety of life, and the mechanism of nature's will.
This is children's level science.
"A person that carries a cat home by the tail will receive information that will always be useful to him." Mark Twain
