So I'm against a human friend (Japan) who has now mostly conquered an ai called, "Mongol". Mongolia still has some small cities but is mostly out of the game. Now it's only me left to stop my friend (Japan). As babylon, I have focused on mainly research and money throughout the game. (I'm new, only second day playing to his year of playing). His warmongering basically was successful. It didn't matter all the ai hated him as he took them down one city at a time (one war at a time). In the end, his large amount of military and citites led him to have lots of gold, equal my passive babylon city in science, AND have enough military after healing to begin closing in on me. How do I counter him at this point? Or is the game mostly up. I am only in the renaissance era and we are equal in tech.