* The Mycenaean palaces were destroyed and the centralized states that they governed collapsed.
* The population of Greece declined significantly.
* The people who remained in Greece were scattered in small, isolated communities.
* The social structure of Greece changed from one based on class to one based on kinship.
Economic changes
* The economy of Greece shifted from one based on trade to one based on agriculture.
* The use of bronze declined and the use of iron increased.
* The production of pottery declined and the production of textiles increased.
Political changes
* The Dark Age saw the rise of the city-state as the primary political unit in Greece.
* The city-states were often at war with each other.
* The government of the city-states varied, but most were oligarchies or tyrannies.
Cultural changes
* The Dark Age saw the decline of the Mycenaean culture and the rise of the Hellenic culture.
* The Hellenic culture was based on the values of individualism and democracy.
* The Dark Age also saw the rise of the Greek alphabet and the development of Greek literature and philosophy.