Im sure this has been touched on a number of times, but what is the optimal number of cities? I'm sure there's a formula for it! How bad are the effects when you first go over the optimal amount, and does the amount compound as you go over more and more or does it stay the same? I find myself asking whats the use in even conquering sometimes unless resources are for capture. Corruption makes these cities virtually unusable and then take up research time and/or gold to build an able defense for many of these cities. IT's got to be the most frusterating feature in the game, much worse then pollution!