Western culture ended slavery.
At least official slavery. I think de facto slavery still exists in some countries and de jure slavery could make a comeback thanks to Islamists.
It was western culture that suppressed slavery. But that was arrogant westerners imposing their morality on other cultures. Perhaps we need to recognize that all cultures are equal so slavery might be just right for some cultures. Thus it should not be suppressed any longer. And, since the 13th amendment clearly discriminates on basis of culture, perhaps we should repeal that amendment. You know, to be inclusive and multi-cultural.