This document provides an overview of early Greek cultures including the Minoans and Mycenaeans. It discusses that the Minoans established the first civilization in Crete around 3000 BC and engaged in extensive trade. Their civilization declined after a possible volcanic eruption. The Mycenaeans then conquered Crete and established kingdoms on the Greek mainland in the 1400s BC. They developed the first written Greek language. Both cultures declined by 1100 BC and were replaced by independent Greek city-states. The document also summarizes the political systems and importance of mythology in early Greek society.