Abolishment of Slavery is the last Enlightenment tech I have left.

I can't recall, but I'm pretty sure I saw Industrial Discontent listed somewhere, but I can't tell if it's directly effecting discontent. Certainly it doesn't seem to appear as a specific factor in my discontent bar (the two divided between Nobility and Plebes). That one is full-up with Clamor for Reform.

But I'm certain I've seen it and I'm pretty sure the tooltip didn't give me a big fat 0.