Yes, I've played quite a few more turns since the posting. However, I did buy iron for some old middle age tech, because I wanted to capitalize on the monopoly of being able to build railroads as soon as possible. I'm already at Replaceable Parts and the Aztecs, my top rival, has only discovered Nationalism. The only railroads and factories in the world are in my territory, and My territory is about 40% RR'd. I think I have more than a competitive position to win. Thanks everyone!