I prefer to be militaristic or at least have massive worker horedes so monarchy untill democracy, if I am going to be warlike then republic with Universal Suffrage is great. I don't like communism not one bit, I don't like having know main producing heart. I like cities that can build armies in 2 turns, you just can't get that on communism. And yes I have done it in many a game, just wherever you can build Iron works, move your capitol their, build the Iron works, factory, hoover dam, coal plant, hospitol, mine all tiles, mfg plant when the time comes, pollution about every turn so you need at least ten works nearby it for immediate pollution pick up. their is nothing like attacking a civ with twenty armies of modern armor!