Two main operators drive evolution:
1. crossover (breeding)
2. mutation
Believe it or not, once self replicating molecules occur, these operators alone lead to evolution and from them emerge great complexity.
All self replicating molecules come from other self replicating molecules. No self replicating molecules occur spontaneously from non-self replicating molecules. No self replicating molecules survive individually, on their own, without a whole lot of support molecules surrounding them to maintain them in their self replicating capacity.
Without mutation there is no evolution, a large radiation shower of the earth, although unpleasant for the inhabitants in the short term would be like hitting the nitro button for evolution.
The only evidence that we have of a high radiation shower that produced mutations are Hiroshima and Nagasaki. No advancement in the mutations has been observed. Only retardation and death has been observed.
All mutations must be "tried" those that don't live long enough to breed, their mutations are lost forever.
So far many of the mutations on earth have lived to breed, while many others have not survived. When mankind mutated from perfection in the Garden of Eden, to imperfection, he cause mutation around the whole earth. The only reason that life on earth survives this mutation long enough to continue breeding is that God has mercy on mankind, and has granted him and the world strength to live and breed.
Genetic algorithms are scientific proof of evolution, you can witness emergent complexity beyond which was programmed in to the original genome, in fact the seed genome can be junk provided a replicating gene system with crossover and mutation is established. In a simple experiment like this you select the best solutions for breeding and cull the rest, after a modest number of generations excellent solutions can be achieved. I have used this method to tweak parameters of complex systems that would be impossible to do using a brute force try all combos approach.
While this paragraph doesn't make much sense, genetic algorithms are simply patterns of life translated into the language of mathematics. They have nothing to do with evolution. They simply show the ability programmed into the nature of living organisms to survive under many adverse conditions.
In real life the selection is imposed by competition and environment.
Nowhere in nature do we see nature selecting anything. Selection has to do with choice. What we DO see is cause and effect. As far as we scientifically see, even the choices that people make are programmed into them, so that they make the choices the way they do. While the only thing that we can scientifically see is 100% programming, no selection, I can show you how there IS selection available to mankind, but you won't like what I show you.
We are physical manifestations of a trinary code that has been crossed over, mutated and tested for a long long long time.
And that's all there is to it, a creator is not needed.
Actually, it was God who planned and coded this universe. There is no evidence for anything other than this. God did it because He loved mankind, before mankind existed, and even after mankind made his own faulty choices to go against God. Going against God will only cause a person to force himself/herself out of existence. Rather, why not submit to the loving God and be saved?