Propositions such as the idea that mankind can manage its own Moral conceptions and show morality to be relative, while proposing at the same time that there is no such thing as a "Moral Nature" and also showing mankind to be a glorious and wonderful creature capable of managing all things with a flair of sophistication and elegance, are all part of obscurantist thought.
At the same time, Enlightenment thinkers denied such conceptions as the existence of a Higher Mind and so forth, and such thinking is endemic to both the Enlightenment and its obscurantist rhetoric. Today, such thinking is referred to as "Humanism" or "Secular Humanism".
Following the Age of Enlightenment in Europe, the nation states of that region entered into the most destructive wars in all of human history. Modern technology and science were all engaged in the production of weapons of "mass destruction" and human beings were destroyed by the millions.