I have found myself with an entire continent big enough for at least 6 cities all to myself, and have expanded quickly to get 4 cities up and running. I am Persia, and have the Pyramids as well as Chichen Itza. However I am starting to struggle with happiness and need to find some mercantile cs's fast. Anyway my question is this: Is it worth it to expand to fill up the continent? Tradition only covers 4 cities, and I am already at that max with TONS more land to settle, maybe 3 more coastal cities or 2 land-locked. I am going for a science victory, so I don't want to slow my culture down a lot, but will it make up for it by population of my new cities? Golden ages should also be taken into account since I am Persia after all. Any thoughts or advice would be greatly appreciated.