Evil Root?

An odd thought just struck me. You may or may not know the biblical story of Cain and Able, either way, at the end Cain is marked somehow and exiled from the first enclave of people on earth for fratricide, the first murder. I wonder if the mark of Cain was that his skin lost all its pigment. White people do kinda stand out in the multicultural rainbow. And odd thought like I say, but a thought I had none the less.