I usually focus on the other side, and for whatever reason the game I just re-started let me get to 2nd level of the tree w/o forcing me to do military development first, so I'm guessing upgrading the cities or something else must of allowed it.
Like I said, need someone to come along and explain what's up with economy now. W/O trade nodes to spam, got to get a handle on what are the new keys to running economy. I mean I know upgrading ports and that side of tech tree, but what else? And is there a road option to improve? Because this map spreads out, and allies box you requiring a long hike many times. Further, it also seems like many of the upgrades are pretty expensive.
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