I was experimenting around in the game recently, and I tried to come up with some form of booming strategy, that involves the fertility festival tech that is researchable in a house. The fertility festival allows you to train female villagers out of any house. I think this is available to every civ, but civs with cheap houses can really use it to their advantage. So the Celtic civs, as well as the Iberians and the Mauryans can pull this off quite nicely. The trick is to get to the town phase as quick as possible, and then researching fertility festival. Then, the goal is to sustain female villager production from at least 10 houses, which takes around four farms. Once you have that, your economy can start flying off the charts. I have reached the population limit of 300 doing this, by quickly training 150 female villagers and then make 150 soldiers. I managed to do this in about 20 minutes, and reach the city phase at the same time. Though, this would probably be impossible to pull off against an aggressive opponent. What do you guys think?