I just bought this game over a week and a half ago and I'm enjoying it a lot. However, I think it (and games like it) needs a new victory condition (that is, a new way to win).

Cultural, Technological, Diplomatic and Conquest victories are nice, but what about an Economic victory? That is... you're richest player in the game, have a ton of resources, trade with most of the cultures on the map and possess a manufacturing capacity so great that all other nations/countries/cultures are either in awe of you or they fear you so much that they won't dare go against you.