Originally posted by crusin
Serfdom by far. Keeping those pesky peasants under heel makes life worth living. Particularly if they are not members of your culture and religion. There are plenty of places to improve morale for infantry... but when you pay a mere $4-6 for this infantry, life is grand. Particularly handy as a state that spends alot of time fighting in areas of rotten attrition... sure, 10,000 of your infantry have died from frostbite/disease/desertion/starvation/STD's... so what? Build another 10 and send them in! When you have the tech to storm fortresses, this is even more handy... storm away! If you don't succeed the first time, that's OK, another 20K sent in should do the trick.
As for the production bonus of the people... you don't get it if they're rioting all the time, plus, that's what other peoples countries are for...
Keep 'em down!