With 'Individulistic' governments:
Competitive Rule (democratic):
"Several overlapping governments compete with one another for citizens by offering different rights, laws and taxes".
+/- Increased migration (people vote with their feet

) [
downside: cannot turn off migration for citizens]
+ Increased happiness (everyone gets the government they want, or at least something close to it)
+ Reduced planetary edict cost
Plutocratic oligarchy (as current) [oligarchic]
Mobile Hierarchy [Autocratic]
"Upon reaching maturity, people are expected to fend for themselves. Rulership is usually given to whoever manages to take it, by cunning, intelligence, charisma or strength of arms."
+ Increased governor, ruler staring level
+/- On ruler removal, the new leader may be chosen from one of the existing goveners
+/- Rulers and governors are sometimes pushed out of office by a rival (gives and automatically appoints a new leader.
+ more leaders (fewer than peaceful bureaucracy though)
Can build an oversized Statue (giving influence)
And the generic oligarchy becomes aristocratic oligarchy or something?
And 'Collectivist' governments:
Local Assemblies [democratic]
"Decisions are taken on a local level by a meeting of all the citizens at regular intervals. Everyone's perspectives are heard and the best course of action for everyone is voted upon"
+ Increased number of sectors
+ Reduced unrest in sectors
Meritocratic Hierarchy [oligarchic]
"People are promoted based on competence until they reach the limit of their abilities. Someone promoted beyond their competency is demoted (though the stigma for this is on the one who promoted them unduly)"
+/- Increased effect of positive species traits and of ruler traits (including bad ruler traits)
+ increased bonus from leader level
United Society [autocratic]
"Everyone is assigned a role based upon their abilities and the demand for a job. The best scientists think. The best warriors fight. The best ruler rules."
+ Increased food output from slaves
+ Reduced ethics divergence
Can build an oversized Planetary Administration (additional tier, giving its bonus to adjacent tiles of adjacent tiles).