This document summarizes the major periods of ancient Greek civilization and the geographic features and effects on ancient Greece. It discusses three periods: the Early Civilizations of the Minoans and Mycenaeans, Classical Greece dominated by Sparta and Athens, and the Hellenistic Age under Alexander the Great and his empire. It then describes Greece's geography which heavily influenced its seafaring culture and city-state system, as well as the key crops, resources, and myths that developed.