Haha. If Montezuma and Julius Caesar were my closest neighbors, and they became the best of friends through the power of religion, then - rather than enjoy the power of marble - I'd sob profusely while waiting for the inevitable mercy killing. I'm sure they'd be good little AI warmongers, too, and each show up at my doorstep before turn fifty with lol just thinking of how much we wanted to dagger you stacks. And I'd say, "Well. That's great. You know, I've fortified some archers here behind these hill city walls, but the effort's already crippled my infrastructure, so why don't I just roll a new map?" We'd all laugh, they'd pillage my city, and that would be that.
Still, I'd rather have the marble guaranteed. It's part of my preferred playstyle.