But evolution of the species is also explained by the Christian God theory. Just because it is a good explanation doesn't mean it should be used. It can be misleading you. It is obvious you don't know anything about evolution. Try reading something about punctuated equilibrium for example.
Mutations are never random in evolution.
Look around you. There are no random mutants hanging around. There are no random mutants in the fossil record. Try reading something about evolution. Dennet, Hofstadter, Dawkins are three.