Final answer:
From 2000 to 800 B.C.E., Greek city-states initially experienced a period known as the 'Age of Tyrants', eventually transitioning around 500 BCE to oligarchic forms of governance.
Step-by-step explanation:
From 2000 to 800 B.C.E., Greek city-states underwent various forms of governance. During the Archaic period, particularly between 650-500 BCE, many Greek city-states entered the "Age of Tyrants", a time characterized by the rule of tyrants, leaders who did not have official political status but were often appointed by the people to avert civil conflict.
These tyrants, while in power, engaged in activities such as land redistribution, public works, job creation, and trade promotion. Post the tyrannical age, around 500 BCE, a transition to oligarchy occurred, where the government was controlled by the wealthy who had political representation, and the free citizens could vote on laws prescribed by councils.