pringles cheezums

I'm a little puzzled by corporations, more specifically how to start
one.
I have a couple of the techs researched that allow corporations
(including corporation.) I've saved up a couple of each of the great
people, and stored them in my capital.
But...none of the people are able to build a corporation in the city. I
have all the raw materials available.
For instance: I'd like to build Civilized Jewelers. I have a Great
Artist saved up, have researched corporation and mass media, and I have
6 gold mines, 10 silver mines, and 2 gem mines (only one of which I
need, apparently, at least hopefully. any which way, the point is, I've
got them.) Nobody else has built it. But the Great Artist is unable to
make the Jewelers.
Why?

phil osofa

What are your civics? If you have State Property you cannot construct
a "Wonder" corporation.