Origin of the term "obscurantism."

http://en.wikipedia.org/wiki/Obscurantism


And here are definitions from M-W:

"1 : opposition to the spread of knowledge : a policy of withholding knowledge from the general public
2 a : a style (as in literature or art) characterized by deliberate vagueness or abstruseness b : an act or instance of obscurantism"

"obscurantism." Merriam-Webster Online Dictionary. 2009.
Merriam-Webster Online. 25 November 2009
<http://www.merriam-webster.com/dictionary/obscurantism>