I really don't want to get into balancing issues, I just want everything named correctly. Like, Monarchy is a form of Despotism...
But, (I hate when people do that, it means they are going to do what they just said they were not going to do) I almost feel as if that shouldn't be what dictates that size of your government. Just because a government is 'newer' doesn't mean it is better.
And then, if you are going to go with the 'each one is better then the last' then each one should be slightly better then the last. 2-5% more

, 1-2 less instability, ect ect. Not completely random stats from one government to the next. That should be what 'Commerce', 'Labor', 'Religion', ect, should be for. They should be to fine tune your country's play style.
@Hydro:
Not sure, but here is the definition of them:
"Democracy" and "republic" are not mutually exclusive, but not identical either. Democracy means "rule by the people" while republic means "rule by elected officials" (as opposed to hereditary rulers). All republics are democracies, but not all democracies are republics (a "direct democracy" is not). (
http://wiki.answers.com/Q/What_is_the_difference_between_a_republic_and_a_democracy)
@bill:
You are right, it is an 'ideology', it is not, in and of it's self, a government. It is a type of Nationalism, I guess if we have a category called Nationalism, we could put it there. (Read this for more:
http://en.wikipedia.org/wiki/Types_of_nationalism)