Nobody. That's the way it grew up. Greece was never united until they were all conquered by a single person. That would be Philip of Macedon, Battle of Chaeronea, 338 BC. Actually, pretty much everywhere in the world, city states pre-date empire.
Spartains ate this discusting mix of pork blood vinigar and salt. Other citystates ate cheese, wine, grapes, and bread.
Province
citystates
citystates
Citizen
Athens and Sparta .
To gain land for farming
yes it was
PLS HEP
Greece was divided into independent city-states. Four of the most powerful city states were Athens, Sparta, Corinth, and Argos.
The land was generally poor, so to gain food security, trade was used to buy external sources of food.
Sumerian citystates were originally theocracies.