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[In fact several astronomers where burned at the stake as heretics for claiming the earth revolved around the sun. And there was a ban on the notion until the early 1800’s. I'd venture to guess people were not nearly so open-minded back then as they are today...]

If you think that “we” today are an “enlightened” people, talk to a few “Christian fundamentalists” about the origins of the world and you may think that you ARE back in the “dark ages”,
For that matter try the practicing beliefs of fundamentalist Muslims and their interpretation of the Koran to see what “closed mindedness” also is,
If you want bigotry and bias then check out the “Arian nations”
For true “enlightenment” how about the “teachings” of George W Bush??
The KKK?
etc, etc.
The list goes on and on and ----