If it is not from God, then creation would have to start somewhere, with something. As seen, any argument for or against God can uphold many good ideas, but none can prove anything. It would seem that because all we have, as fundamental proof is the Bible, and the possibility that Jesus was his son, that God was created from man to answer any and all questions that would strike fear in us had God not existed. We fear death, because it would not be positive to just die, and exist nowhere in no time or dimension, thus God is created to explain the soul, therefor, explaining why we do not die, just become a new stage of being. Still, there is no real fundamental proof that God ever was, or is, people just take it on faith that he exists and questioning that existence is wrong, thus God exists because he does not need proof, belief in Him is proof enough.
Evolution answers that question.
Our biology and archeological finds show that man has been evolving from the dawn of time, or as far back as any Homo-x creature can be found. It would seem that science is founded on a stronger ground than, belief, thus God does not exist because science can prove his existence through evolution. Brad, I am not very knowledgable about the aspects of evolution but it sounds to me like you are. Predators are thought to started to come along in this period. Of course, we don't know everything, and more is coming out every day.