" An accurate view of evolution, in all its multifaceted and anarchic glory... We are all evolved creatures who share a common way or perceiving and responding to the world. And yet each of us is unique, the product on an irreproducible set of causal events. Given that we cannot judge people on the basis of their biology or their fitness with respect to some arbitrary criterion of optimality, we have to conclude that all human variants are equally valid. (This conclusion can be derived purely on ethical grounds as well.) None of us is advantaged because of evolution over any other, whether strong or weak, able-bodied or disabled, woman or man, black, white, or any other color. Simply existing as part of the human species, each person automatically has an inherent worth and dignity. "

― Greg Graffin