I found out last night that you dont have to finish prerequisite buildings to build wonders, etc. For instance, the Hanging Gardens requires that you have an aqueduct in that city. I had a city producing mad hammers, but it only had a 5 population, so I wanted to build the Hanging Gardens there but I didn't need an aqueduct in that city yet. I found out that if you start the aqueduct, then let it build for 1 turn, the next turn you can change production to the Hanging Gardens, and put the aqueduct on hold. I assume this would work for other things as well, such as forge/Eiffel Tower, etc. However I dont think it would work for Oxford or religious cathedrals, as they require x amount of finished prereq. buildings. LAnkou, I very much enjoyed your "nuclear-diplomacy"