In my recent thread, some experienced players mentioned building Wealth -- turning directly into -- as a better option than building a market. I've been assuming that building wealth or research -- turning directly into -- were only last resorts / dead ends for little towns that had low production. Apparently not. Now, given that nearly everything in Civ 4 is situational, would you help with some example situations where one might choose to build wealth or build research in a city? If you're building something else (say a unit), do you ctrl-click to put Wealth at the top of the queue? and then click to remove it, and resume building the unit? Or do you shift-click to put it at the end of the queue, and let it finish? How long would you run Wealth in those situations? Until you have built up a certain amount of gold, or a certain number of turns? The best cases for building research would seem to be when one is in a close race for a key tech (like Liberalism), but I may be missing something.