France is occupying one of my districts so that I can't use my great person there and we are allies.
How do I get them to move? *shakes fist*
Skip turn and/or move your units until they move.
Any leader that gets the Religion bonus that lets you buy Campus buildings with Faith. After having that religion tenet for a while I had so much faith by the end of my game that I had completed Future Tech 5ish times as well as the rest of the science tree. And I had stopped bothering with Science at some point and just focused on production. Communism as your late game government to get those projects going is VIP.
Exactly why science isn't quite the only major component to a science victory. Production is probably more important in many cases.