sinergistic,
That's something I've been working on for a long time. I used to play Civ 1 and to get a boost I'd use the "3 city trick." When you start as rome there was an approxmately 50% chance you'd start with two settlers instead of one. If you played on "Earth" map, you'd be a few steps away from France, which you could easily conquer with Settlers. Settlers were military units in Civ 1, they just had 0 attack and 1 defense, and you always had the option to keep a city, even at size 1. I've been doing this since the early 1990s... You could say that conquering Earth, starting as Rome, has been a past-time for me.
Anyways, I also used the Earth 34 civs mod, which makes Europe extremely crowded. When I turned off city razing, it permitted me to expand without building Settlers, which hastily speed up the process of taking over the world.