I'm no trained scientist or expert on evolution, but isn't the very basis of evolution theory that lifeforms evolve because of mutation? Genes that cause bad mutations are eliminated because the organisms don't survive and reproduce. Yet, "good" mutations create more successful organisms, which in turn reproduce and "strengthen the herd." The comment about the possible advantage of a white moose in the snow is very interesting. Why not let nature give the answer as to whether it is truly better? (of course humans are part of the whole system, and if being white gets you killed by a bunch of humans, for whatever reason, i guess it's a bad trait...)

cheers!