I'm currently having problems getting a spaceship victory because I'm running out of gold. Usually I hit the wall right about the time I need to build universities and colluseums. How can I make enough money to afford these and also a couple alliances with city states? I've been popping out trading posts but that doesn't seem to keep up. It seems to me that playing on Pangea would make it easier to make money because you'll meet more Civ's to sell things to vs. playing on archipelago. But can you sell open borders on pangea? I have never gotten the AI to buy open borders from me. Any help or general tips would be greatly appreciated!