I have had debates with people who believe that there is no objective morality and that no one culture is superior to any other culture. Slavery has been the example I have used to show why this is untrue. A culture that holds the intrinsic dignity of all humans is superior to a culture that enslaves a portion its population. This is really the ABC’s of morality. I think in the future I am going to give the follow as another example.
genital mutilation a white wedding
To me this shows how you have to be disingenuous towards your own integrity to really hold this view.