Got a UN victory on immortal, perfect world 3; first time I tried playing with an interior capital city (usually coastal.) (I only married 1 CS.) I thought I had the game under control until India and Japan decided they wanted to conquor the world but I avoided wars (was on my own continent.) India had the highest score and build Appolo and UN and had one booster built. It always seems that late in the game the AI build the UN whether or not they have the required CS locked up.