I believe that the mind set we call morality is absolutely a natural function common to all humans. I base this belief on myself and on first hand observations of other human beings. When I witness an injustice or am doing one myself I feel a physical repugnance, sort of a nausea that was not taught me and seems to have come with my genetic package. I have often witnessed, commonly, when a person carried away by emotion or greed, the look on their faces when they understand they're in the wrong and the remorse hits. I've seen this in children and adults. Of course I've run into maniacs and the morally bankrupt, but this is not the norm.