I'd like to point out that Cooperation is pretty bad. I took it in my OCC game when i have lots of Flood Plains, Tradition and Polders. It is a unique start, but it is still not that good. As a better example i think we can take my Washington's game (https://imgur.com/a/xry8o) I founded religion on turn 92 when i had 6 population (almost 7). That is Classical Era. On turn 192 my capital is 16 population, so cooperation will be triggered 10 times. So city pop in Tradition Capital grows 1 population every 9-10 turns. Starting from Medieval it is 10 yields when citizen is born and in Renaissance it is 15. So average is 10 and basically it is an average of 1 of every yield per turn. And it is Capital! Other cities grow with lower speed! In comparison lats take Pagodas. I understand that you need to build it and spend faith on it, but you get 1 of every yield right away for having only your religion. You are pretty guaranteed to have at least 1 other religion in all your cities, more likely you will have 2. Pagodas need faith to build but they give you ~3 times more than Cooperation. The only thing is that Ai always overperforms with Cooperation on higher difficulties, but thats a matter of another thread.