For evolution to have occurred requires the ability to create massive amounts of information to drive an increase in complexity. Natural Selection cannot be the mechanism which accomplished this because selection acts to reduce genetic variation in a population.  Kenneth Miller disagrees, claiming that evolution starts with existing genes, duplicates them and then introduces variation which is filtered by selection.  Simple!  Unfortunately, Miller; the scenario he presents of the evolution of the complex vertebrate blood-clotting system is not plausible.  All he can offer in the place of proof is faith in a story he already assumes to be true.  Uplook Magazine, May-July 2010, p.4.  References:  Miller, KR.  Finding Darwin's God (New York, NY:Cliff Street Books, Harper Collins, 2000);  Miller, KR, The Evolution of Vertebrate Blood Clotting, http://www.millerandlevine.com/km/evol/DI/clot/Clotting.html;  Sanford, JC, Genetic Entropy & The Mystery of the Genome;. (Lima, NY: Elim Publishing, 2005).