Okay, I have 510 cities, bismark has 1. I have his city surrounded by 30 or so cavalry. He has 2 rifleman, a spearman, and a longbowman and has to be building Wealth just to break even. I just bought a tech from him by giving him all 8 luxuries, most strategic resources and paying him 500 or so gold/turn. We also sign a MPP (to guard each other from the aliens and barbarians ). The very next turn he demands tribute from me!! I tell him to get lost and he declares war!