The Golden Rule came from Jesus(one who claimed to be I AM, before the existence of Abraham) who stated,”I came not to destroy the law but to fulfill it”. Since the Mosaic Law came out of a people who had committed supposedly immoral acts, I ask you again from hence do you derive your own sense of morality and Ethics? It’s a rhetorical question really, one that each person has to try to answer for him or her self.
God’s work with Humans is progressive, and individualistic... thru history in the macro sense and via the Spirit in the personal sense. The Bible says the nations are nothing, it’s individual people that God looks to save.
The Golden Rule and the concept of reciprocity can be be found in many civilizations across time and geography. I’ve yet to find a moral basis that can be bettered.
The original article claims that genocide is a direct result of Darwin’s theories. Since genocide existed prior to Darwin and, in some cases, was divinely ordered, it’s clear that the article is in error.