Many of my games (mostly regent level, and the last couple have been standard maps mostly water islands) have had a civ that has stayed in one city through 1AD, not due to lack of expansion room. Opening an embassy has shown that they generally have not been building a wonder off the bat which is the only logical explanation, and that they have quite a few spearmen in the capital. Does anyone know why a civ occasionally doesn't expand? Does the AI take a OCC without telling anyone? 
