Immigration: Seriously, this is a key factor when it comes to any type of civilization. The Romans had a problem (and eventual) solution for this and its still a major political topic in modern history. Plus, when going against someone more tech advanced it should only be natural those behind him's or her's citizens to want to go there. And there should be +s & -s for that. One being (Albeit Einstein) type immigrants than of course those who just take up space and possibly may take you down a peg. I mean it should depend on your neighbors. If your neighbors are modern and your futuristic that means if your citizens are unhappy they leave with the tech knowledge with them. However, if your citizens are happy then you get additional people who may help or hurt you in the process. Also, I'm a big fan of R&F of civs. I think immigrants should lead to what starts some civilizations. Be it randomized or history based (america from england for example). Trade Caravans: The main reasons I think this should be added is solely to give pirates & barbarians some type of reason for being there. Pirates especially, I mean for god sakes Pirates didn't just roam the coast attacking ships! They attacked cities, took goods, kidnapped and such. I think it would be a good upgrade if they made trade vehicles for when your sending gold, rice or w/e and allow other users or the AI to take it. Taking the BTS Blockade feature it makes sense to do that. Plus, imagine the idea of kidnappings, organized crime and stuff like that (more geared towards mods or expansions but still). Then lets not forget this could help when it comes to making wonders in cities with little culture. Combining that with my immigration idea you can pool all your resources and resources from allies to one city to build a wonder rather than hope you spawn a great engineer. What you dudes think?