Bigfoot
Emperor
Just a thought, why not allow for citizens relocate from one civ to a different one? A combination of factors (relative happiness, culture, economic conditions) could be used to determine if a relocation occurs. The moving citizen would retain its nationality, with whatever impact this may have on happiness, corruption, possible rebellion, etc. Presumably certain government types would limit or prohibit the ability of citizens relocating (Facism and Communism). Historically such population movements have had a major impact. It would (I think) introduce a new game element without detracting from overall playability. What do you all think?