Answer:
They had a democratic system.
Step-by-step explanation:
Greece had the first democratic system know. That's why is considered as a potency in knowledge, they dedicated a lot of years trying to improve and finding theories that could explain everything around.
This assembly meetings were known as Ecclesia, located in the ancient Athens. It was an open meeting were all people could assist and participate, the only requirement was to be a citizen. In those meeting important decision were taken, as war declarations, military strategy and elections for authorities.